YASUO TOMITA
| Emeritus Professor etc. | Emeritus Professor |
| Cluster III (Fundamental Science and Engineering) | Emeritus Professor |
- Profile:
1978-80: Statistical properties of speckle patterns in polychromatic and white light
1978-80: Statistical properties of laser and white light speckles
1980-84: Magneto-optical effect in multilayered structures and its application to magneto-optic memories
1984-89: Modal dispersal of information and wave mixing in photorefractive crystals for information retrieval, processing and sensing
1989-present: Nonlinear photonics, nonlinear optical phenomena in photorefractive materials and liquid crystals and their applications to information processing, Polymer photonics, Nanophotonics, Physics and applications of ultrafast optical pulses, nanoparticles photonics, photonic recording materials, neutron optics
Researcher Information
Degree
Career
Educational Background
- Jun. 1989
Californica Institute of Technology, Division of Applied Sciences, Department of Electrical Engineering, United States - Jun. 1986
California Institute of Technology, Division of Applied Sciences, Department of Electrical Engineering, United States - Mar. 1980
Hokkaido University, Graduate School, Division of Engineering, 電子工学専攻 - Mar. 1978
Hokkaido University, Faculty of Engineering, 電子工学科
Member History
- 12 Sep. 2018 - 10 Oct. 2018
Reviewer, The Irish Research Council’s Laureate Award (IRCLA) scheme, Government - 14 Mar. 2015
Associate Editor, Journal of the Optical Society of America B (JOSA B), Society - Oct. 2013 - Mar. 2014
委員, 日本光学会 光学論文賞選考委員会 - Dec. 2012 - Nov. 2013
専門委員, 日本学術振興会科学研究費委員会 - Aug. 2006 - Jul. 2008
特別研究員等審査会専門委員および国際事業委員会書面審査員, 日本学術振興会特別研究員等審査会および国際事業委員会 - 2003 - 2004
幹事, 日本光学会, Society - 1993 - 2000
幹事, 日本光学会（応用物理学会）位相共役・光波ミキシング研究グループ - 1999 - 1999
奨励賞選考委員会委員, 日本光学会, Society - 1996 - 1999
位相共役・光波ミキシング研究会幹事, 日本光学会, Society - 1998 - 1998
委員, 日本光学会（応用物理学会）奨励賞選考委員会 - 1995 - 1996
委員, 応用物理学会 第２回「科学と生活」フェスティバル運営委員会 - 1995 - 1996
応用物理学会第２回「科学と生活」フェスティバル運営委員会委員, 応用物理学会, Society - 1992 - 1993
委員, 財団法人 光産業技術振興協会 平成４年度「立体画像・レーザディスプレイ」技術調査専門委員会
Research Activity Information
Award
- Jan. 2015
国際光工学会 (The international society for optics and photonics: SPIE)
国際光工学会 (The international society for optics and photonics: SPIE)フェロー, 富田康生
International society, United States - May 2014
公益社団法人 応用物理学会
ホログラフィックナノコンポジット材料に関する先駆的研究
第８回（２０１４年度）応用物理学会 フェロー表彰, 富田康生
Others, Japan - Jan. 2014
Optical Society of America
USA
OSA Fellow
United States
Paper
- Very high contrast volume holographic gratings recorded in photopolymerizable nanocomposite materials
Y. Tomita; T. Aoi; S. Hasegawa; F. Xia; Y. Wang; J. Oshima
Optics Express, The Optical Society, 28, 28366-28382, 10 Sep. 2020, Peer-reviwed
Scientific journal, English - Nanodiamond-polymer composite gratings as diffractive optical elements for light and neutrons: I. Their fabrication and light optical diffraction properties
Yasuo Tomita; Akihisa Kageyama; Yuko Iso; Koichi Umemoto; Ming Liu; Jürgen Klepp; Christian Pruner; Tobias Jenke; Peter Geltenbort; Martin Fally
Proceedings of SPIE, SPIE, 11367, 113670M-1-113670M-10, 06 Apr. 2020, Peer-reviwed
International conference proceedings, English - Nanodiamond-polymer composite gratings as diffractive optical elements for light and neutrons: II. Neutron optical diffraction properties
M. Fally; J. Klepp; C. Pruner; J. Tobias; P. Geltenbort; A. Kageyama; Y. Iso; K. Umemoto; M. Liu; Y. Tomita
Proceedings of SPIE, SPIE, 11367, 113670N-1-113670N-8, 06 Apr. 2020, Peer-reviwed
International conference proceedings, English - Ag nanoparticle-enhanced alkyl radical generation in photopolymerization for holographic recording
J. Guo; J. Jian; M. Wang; Y. Tomita; L. Cao; D. Wang; X. Zhang
Nanophotonics, De Gruyter, 8, 1795-1802, 16 Sep. 2019, Peer-reviwed
Scientific journal, English - Hybperbranched polymer nanocomposite gratings for volume holographic optical elements
Y. Tomita; T. Aoi; S. Hasegawa; K. Kaseda; J. Oshima; K. Odoi
Technical Digest of the thirteenth Japan-Finland Joint Symposium on Optics in Engineering (OIE'19), Aalto University, City of Espoo, and Optical Society of Japan, 3-4, 26 Aug. 2019, Peer-reviwed
International conference proceedings, English - Observation of slow-neutron diffraction from holographic nanodiamond composite gratings
J. Klepp; M. Fally; P. Geltenbort; Y. Iso; T. Jenke; A. Kageyama; C. Pruner; K. Umemoto; Y. Tomita
Technical Digest of European Conference on Neutron Scattering (ECNS 2019), European Conference on Neutron Scattering, 58, 30 Jun. 2019, Peer-reviwed
International conference proceedings, English - Light and slow-neutron diffraction properties of holographic nanodiamond composite gratings
Y. Tomita; A. Kageyama; Y. Iso; K. Umemoto; J. Klepp; C. Pruner; M .Fally
Technical Digest of Conference on Lasers and Electro-Optics Europe and 14th European Quantum Electronics Conference 2019 (CLEO/Europe-EQEC 2019), OSA, IEEE Photonics Society, EPS, CE-8.5 TUE, 25 Jun. 2019, Peer-reviwed
International conference proceedings, English - Light and slow-neutron diffraction properties of holographic nanodiamond composite gratings
Y. Tomita; A. Kageyama; Y. Iso; K. Umemoto; J. Klepp; C. Pruner; M. Fally
Technical Digest of Photorefractive Photonics and beyond (PR’19), Universite de Lorraine, Centrale Supelec, French Branch of the EOS, 58-59, 18 Jun. 2019, Peer-reviwed
International conference proceedings, English - Retrieving the profile of holographic gratings by diffraction experiments
M. Fally; J. Klepp; M. A. Ellabban; J. Kohlbrecher; J. Guo; Y. Tomita
Proceedings of SPIE, SPIE, 11030, 1103001-1-1103001-6, 02 Apr. 2019, Peer-reviwed
International conference proceedings, English - Monte-Carlo simulation of neutron transmission through nanocomposite materials for neutron-optics applications
M. Blaickner; B. Demirel; I. Drevenˇsek-Olenik; M. Fally; P. Flauger; P. Geltenbort; Y. Hasegawa; R. Kurinjimala; M. Liˇcen; C. Pruner; S. Sponar; Y. Tomita; J. Klepp
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (NIMA), Elsevier, A916, 154-157, 01 Feb. 2019, Peer-reviwed
Scientific journal, English - Holographic waveguids in photopolymers
R. Fernandez; S. Bleda; S. Gallego; C. Neipp; A. Marquez; Y. Tomita; I. Pascual; A. Beléndez
Optics Express, OSA, 27, 827-840, 11 Jan. 2019, Peer-reviwed
Scientific journal, English - Diffractive and interferometric characterization of nanostructured photopolymer for sharp diffractive optical elements recording
R. Fernandez; S. Gallego; Y. Tomita; I. Pascual; A. Belendez
Polymers, MDPI, 10, 518-1-518-11, 10 May 2018, Peer-reviwed
Scientific journal, English - Photopolymerizable nanocomposite gratings for holographic control of slow neutron beams
Y. Tomita; A. Kageyama; T. Aoi; Y. Iso; K. Umemoto; J. Klepp; C. Pruner; M. Fally
Proceedings of OPAL 2018, Institute of Physics, 1-4, 09 May 2018, Peer-reviwed
International conference proceedings, English - Spatial frequency response of nanocomspoite holographic gratings
Y. Tomita; T. Nakamura; A. F. Rizky; R. Fujii
Proceedings of SPIE, SPIE, 10679, 106790U-1-106790U-8, 22 Apr. 2018, Peer-reviwed
International conference proceedings, English - Photopolymerizable nanoparticle-polymer vomposite materials for light and neutron beam manipulations
Y. Tomita; K. Nagaya; T. Aoi; Y. Iso; A. Kageyama; N. Nishimura; K. Odoi; K. Umemoto; J. Klepp; C. Pruner; M. Fally
Proceeding book of PHOTOPTICS 2018, 313-322, 25 Jan. 2018, Peer-reviwed
International conference proceedings, English - Theory of closed-aperture Z-scan for nonlinear media with saturable absorption and simultaneous third- and fifth-order nonlinear refraction
S. Matsushima; Y. Tomita
Technical Digest of the 24th Congress of the International Commission for Optics (ICO-24), The International Commission for Optics (ICO), P7-06-1-P7-06-3, 21 Aug. 2017, Peer-reviwed
International conference proceedings, English - High-order optical nonlinearities in nanocomposite films dispersed with semiconductor quantum dots at high concentrations
Y. Tomita; S. Matsushima; R. Yamagami; T. Jinzenji; S. Sakuma; X. Liu; T. Izuishi; Q. Shen
Journal of Physics: Conference Series, Institute of Physics, 867, 012011-1-012011-5, 17 Jul. 2017, Peer-reviwed, Invited
Scientific journal, English - Femtosecond dynamics of optical nonlinearities in nanocomposite films highly dispersed with semiconductor CdSe quantum dots
Y. Tomita; R. Yamagami; T. Jinzenji; S. Sakuma; T. Izuishi; Q. Shen
Conference on Lasers and Electro-Optics Europe and 13th European Quantum Electronics Conference 2017 (CLEO/Europe-EQEC 2017), EPS, OSA, IEEE, CE-P.18, MON, 25 Jun. 2017, Peer-reviwed
International conference proceedings, English - Observation of neutron pendellösung-interference in holographic nanostructures
J. Klepp; C. Pruner; Y. Tomita; P. W. Geltenbort; M. Fally
Proceedings of SPIE, SPIE, 10233, 26 Apr. 2017, Peer-reviwed
International conference proceedings, English - Thermal effects of the functionalities of chain transfer agent on photopolymer holographic volume gratings
J. Guo; Y. Tomita; X. Zhang
Proceedings of SPIE, SPIE, 10233, 102330D1-102330D6, 25 Apr. 2017, Peer-reviwed
International conference proceedings, English - Nanocomposite materials incorporating metallic nanoparticles/semiconductor quantum dots and their applications in nonlinear optics
X. Liu; Y. Tomita
Technical digest of The 4th International Symposium on Later Interaction with Matter (LIMIS), SPIE, S5-P06, 08 Nov. 2016, Peer-reviwed
International conference proceedings, English - Hyperbranched-polymer dispersed nanocomposite volume gratings for holography and diffractive optics
Y. Tomita; S. Oyaizu; S. Takeuchi; H. Urano; T. Fukamizu; N. Nishimura; K. Odoi
Proceedings of SPIE, SPIE, 10022, 10022P-1-10022P-9, 12 Oct. 2016, Peer-reviwed
International conference proceedings, English - Advancing data analysis for reflectivity measurements of holographic nanocomposite gratings
J. Klepp; C. Pruner; Y. Tomita; P. Geltenbort; J. Kohlbrecht; M. Fally
Journal of Physics: Conference Series, Institute of Physics, 756, 012022-1-012022-9, 10 Oct. 2016, Peer-reviwed
Scientific journal, English - Observation of neutron Pendullösung interference in holographic nanostructures
J. Klepp; C. Pruner; Y. Tomita; P. Geltenbort; M. Fally
Proceedings of the 2016 Meeting of Austrian Neutron and Synchrotron Users (NESY), Austrian Neutron and Synchrotron Users (NESY), 1-2, 16 Sep. 2016, Peer-reviwed
International conference proceedings, English - Readout fidelity of coaxial holographic digital data page recording in nanoparticle-(thiol-ene) polymer composites
K. Nagaya; E. Hata; Y. Tomita
Japanese Journal of Applied Physics, The Japan Society of Applied Physics, 55, 09SB03-1-09SB03-4, 28 Jul. 2016, Peer-reviwed
Scientific journal, English - Nonlinear optical responses of photopolymerizable nanocomposites dispersed with CdSe quantum dots at high concentrations
Y. Tomita; R. Yamagami; T. Jinzenji; T. Izuishi; Q. Shen
Technical digest of Novel Optical Materials and Applications in OSA Advanced Photonics, OSA, NoW2D.4, 1-2, 18 Jul. 2016, Peer-reviwed
International conference proceedings, English - Blue-sensitized nanoparticle-(thiol-ene) polymer composites for volume holographic recording
J. Takahashi; M. Kawana; Y. Tomita
Proceedings of SPIE, SPIE, 9889, 988913-1-988913-8, 04 Apr. 2016, Peer-reviwed
International conference proceedings, English - Spatial frequency responses of anisotropic refractive index gratings formed in holographic polymer dispersed liquid crystals
Yoshiaki Fukuda; Yasuo Tomita
Materials, MDPI, 9, 3, 188-1-188-16, 10 Mar. 2016, Peer-reviwed, Invited
Scientific journal, English - Nanoparticle-polymer composite volume holographic gratings dispersed with ultrahigh-refractive-index hyperbranched polymer as organic nanoparticles
Yasuo Tomita; Hiroshi Urano; Taka-aki Fukamizu; Yasuhiro Kametani; Naoya Nishimura; Keisuke Odoi
OPTICS LETTERS, OPTICAL SOC AMER, 41, 6, 1281-1284, Mar. 2016, Peer-reviwed, We report on volume holographic recording at a wavelength of 532 nm in photopolymerizable polymer nanocomposites that are incorporated with new hyperbranched polymers (HBPs) acting as transporting organic nanoparticles. Since HBPs possess an ultrahigh index of refraction of 1.82 due to the inclusion of triazine and aromatic ring units, highcontrast transmission volume holographic gratings with refractive index modulation amplitudes as large as 2.2 x 10(-2) are recorded. This value enables us to realize a 10 mu m thick transmission volume grating with the diffraction efficiency near 100% in the green. (C) 2016 Optical Society of America
Scientific journal, English - Photopolymerizable nanocomposite photonic materials and their holographic applications in light and neutron optics
Y. Tomita; E. Hata; K. Momose; S. Takayama; X. Liu; K. Chikama; J. Klepp; C. Pruner; M. Fally
Journal of Modern Optics, Taylor & Francis, 63, S3, S1-S31, 22 Feb. 2016, Peer-reviwed, Invited
Scientific journal, English - Volume holographic recording in photopolymerizable nanocomposites incorporating ultrahigh refractive index hyperbranched polymer
S. Takeuchi; Y. Liu; N. Nishimura; T. Ono; J. Takahashi; K. Odoi; X. Tan; Y. Tomita
Technical digest of International Workshop on Holography and Related Technologies (IWH2015), We5-P5-1-We5-P5-2, 01 Dec. 2015, Peer-reviwed
International conference proceedings, English - On the optical measurement of polymerization shrinkage: Interferometric method vs. holographic method
Y. Tomita
Technical digest of International Workshop on Holography and Related Technologies (IWH2015), We4-3-1-We4-3-2, 01 Dec. 2015, Peer-reviwed
International conference proceedings, English - Nanoparticle-concentration and thiol-ene stoichiometry dependences of readout fidelity in a coaxial holographic digital data storage system using a photopolymerizable nanoparticle-(thiol-ene) polymer composite film
Y. Tomita; K. Nagaya
Technical digest of International Symposium on Optical Memory 2015 (ISOM’15), ISOM, 34-35, 04 Oct. 2015, Peer-reviwed
International conference proceedings, English - Observation of multi-energy neutron matter-wave Pendellösung interference in holographic nanostructures
J. Klepp; C. Pruner; Y. Tomita; P. Geltenbort; M. Fally
6th European Conference on Neutron Scattering (ECNS2015), Institute of Physics, PS-3-47, 03 Sep. 2015, Peer-reviwed
International conference proceedings, English - Photopolymerizable polymer nanocomposites incorporated with hyperbranched polymer having ultrahigh index of refraction for holographic light manipulation
Y. Tomita; H. Urano; T. Fukamizu; Y. Kametani
Proceedings of SPIE, SPIE, 9564, 95640S-1-95640S-7, 13 Aug. 2015, Peer-reviwed
International conference proceedings, English - Fabrication and nonlinear optical characterization of highly CdSe quantum dot dispersed polymer nanocomposites
Y. Tomita; R. Yamagami; T. Jinzenji
Conference on Lasers and Electro-Optics Europe and 13th European Quantum Electronics Conference 2015 (CLEO/Europe-EQEC 2015), OSA, IEEE, EPS, QEOD, CE-8.5 TUE, 23 Jun. 2015, Peer-reviwed
International conference proceedings, English - Measurement of polymerization-shrinkage evolution during curing in photopolymer with a white-light Fabry-Perot interferometer
Masaru Kawana; Jun-ichiro Takahashi; Jinxin Guo; Yasuo Tomita
OPTICS EXPRESS, OPTICAL SOC AMER, 23, 12, 15356-15364, Jun. 2015, Peer-reviwed, We propose a simple method of measuring polymerization-shrinkage evolution during curing in photopolymer. The real-time spectral fringe analysis of a broadband beam transmitted through a Fabry-Perot etalon supported by a photopolymer film provides the shrinkage evolution during curing. For the proof-of-principle demonstration a blue-sensitized nanoparticle-polymer composite material is used. It is shown that the measured shrinkage dynamics are well correlated with the photo-calorimetric conversion dynamics of monomer to polymer. We also discuss a discrepancy in steady-state shrinkage between our proposed and holographic Bragg-angle detuning measurements. (C) 2015 Optical Society of America
Scientific journal, English - Volume holographic recording in nanoparticle-polymer composite doped with multifunctional chain transfer agents
J. Guo; R. Fujii; Y. Tomita
Optical Review, Springer, 22, 5, 832-836, 14 May 2015, Peer-reviwed
Scientific journal, English - Characterization of volume holographic recording in photopolymerizable nanoparticle-(thiol-ene) polymer composites at 404 nm
M. Kawana; J. Takahashi; S. Yasui; Y. Tomita
Journal of Applied Physics, American Institute of Physics, 117, 053105-1-053105-6, 15 Feb. 2015, Peer-reviwed
Scientific journal, English - Effects of chain-transferring thiol functionalities on the performance of nanoparticle-polymer composite volume gratings
Jinxin Guo; Ryuta Fujii; Takanori Ono; Juergen Klepp; Christian Pruner; Martin Fally; Yasuo Tomita
OPTICS LETTERS, OPTICAL SOC AMER, 39, 23, 6743-6746, Dec. 2014, Peer-reviwed, We report influences of varying functionalities of thiols as chain transfer agents on the spatial frequency response, polymerization shrinkage, and thermal stability of a volume grating recorded in a photopolymerizable ZrO2 nanoparticle-polymer composite film. It is shown that a substantial increase in the saturated refractive index modulation is realized at high spatial frequencies by doping with multifunctional thiols. Moreover, the incorporation of multifunctional thiols considerably suppresses polymerization shrinkage of recorded volume gratings and thermal changes in refractive index and film thickness as compared with the case of mono-thiol. These results indicate that multifunctional thiols provide effective control of the properties of nanoparticle-polymer composite volume gratings for various applications in light and neutron optics. (C) 2014 Optical Society of America
Scientific journal, English - On the role of multifunctional chain transfer agents in recording nanoparticle-polymer composites holographic grating
Jinxin Guo; Ryuta Fujii; Yasuo Tomita
Technical digest of International Workshop on Holography and Related Technologies (IWH2014), International workshop on holography, Beijing Institute of Technology, Tsingha University, Holography system development forum, 56-57, 15 Oct. 2014, Peer-reviwed
International conference proceedings, English - Characterization of photopolymerizable nanoparticle-(thiol-ene) polymer composites for volume holographic recording at 404 nm
M Kawana; J. Takahashi; S. Yasui; Y. Tomita
Proceedings of SPIE, SPIE, 9131, 913119-1-913119-8, Jun. 2014, Peer-reviwed
International conference proceedings, English - Spatial frequency response of a volume hologram recorded in a ZrO2 nanoparticle-dispersed acrylate photopolymer film containing chain transfer agents
J. Guo; R. Fujii; Y. Tomita
Proceedings of SPIE, SPIE, 9131, 913118-1-913118-7, Jun. 2014, Peer-reviwed
International conference proceedings, English - Nanoparticle polymer composite volume gratings incorporating chain transfer agents for holography and slow-neutron optics
Ryuta Fujii; Jinxin Guo; Juergen Klepp; Christian Pruner; Martin Fally; Yasuo Tomita
OPTICS LETTERS, OPTICAL SOC AMER, 39, 12, 3453-3456, Jun. 2014, Peer-reviwed, We demonstrate twofold enhancement of the saturated refractive index modulation (Delta n(sat)) recorded in a photopolymerizable nanoparticle-acrylate polymer composite film by incorporating thiols acting as chain transfer agents. The chain transfer reaction of thiols with (meth) acrylate monomer reduces the polymer crosslinking density and facilitates the mutual diffusion of nanoparticles and monomer during holographic exposure. These modifications provide increased density modulations of nanoparticles and the formed polymer, resulting in the enhancement of Delta n(sat) as high as 1.6 x 10(-2) at a wavelength of 532 nm. The incorporation of thiols also leads to shrinkage suppression and to improvement of the grating's spatial frequency response. Such simultaneous improvement is very useful for holographic applications in light and neutron optics. (C) 2014 Optical Society of America
Scientific journal, English - Holographic nanoparticle-polymer composites based on radical-mediated thiol-yne photopolymerizations: characterization and shift-multiplexed holographic digital data page storage
Ken Mitsube; Yuki Nishimura; Kohta Nagaya; Shingo Takayama; Yasuo Tomita
OPTICAL MATERIALS EXPRESS, OPTICAL SOC AMER, 4, 5, 982-996, May 2014, Peer-reviwed, We investigate volume holographic recording in a photopolymerizable nanoparticle-polymer (NPC) composite film that employs radical-mediated thiol-yne step-growth photopolymerizations. Because each alkyne functional group can react consecutively with two thiol functional groups in thiol-yne photopolymerizatins, the thiol-yne based NPC system dispersed with inorganic nanoparticles has the potentiality to overcome the drawback of low crosslinking densities but to retain the advantage of low shrinkage that is possible by use of thiol-ene photopolymerizations. We show that a thiol-yne based NPC film dispersed with 25 vol.% SiO2 nanoparticles and 15 wt.% single functional co-monomer gives the saturated refractive index change as large as 0.008 and the material recording sensitivity as high as 2005 cm/J at a recording and readout wavelength of 532 nm. We find that while the shrinkage of a volume hologram recorded in a thiol-yne based NPC dispersed with organic nanopartices can be as low as 0.5%, it is approximately 1% with the dispersion of SiO2 nanoparticles due to the plasticizing effect of the doped co-monomer. On the other hand, the thermal stability is improved better with the dispersion of SiO2 nanoparticles. We also demonstrate shift-multiplexed holographic storage of 80 digital data pages in a thiol-yne based NPC film with high readout fidelity. (C) 2014 Optical Society of America
Scientific journal, English - Optical Properties of Electrically Tunable Two-Dimensional Photonic Lattice Structures Formed in a Holographic Polymer-Dispersed Liquid Crystal Film: Analysis and Experiment
Mayu Miki; Ryuichiro Ohira; Yasuo Tomita
MATERIALS, MDPI AG, 7, 5, 3677-3698, May 2014, Peer-reviwed, Invited, We report on theoretical and experimental investigations of optical wave propagations in two-dimensional photonic lattice structures formed in a holographic polymer-dispersed liquid crystal (HPDLC) film. In the theoretical analysis we employed the 2x2 matrix formulation and the statistical thermodynamics model to analyze the formation of anisotropic photonic lattice structures by holographic polymerization. The influence of multiple reflections inside an HPDLC film on the formed refractive index distribution was taken into account in the analysis. In the experiment we fabricated two-dimensional photonic lattice structures in an HPDLC film under three-beam interference holographic polymerization and performed optical measurements of spectral transmittances and wavelength dispersion. We also demonstrated the electrical control capability of the fabricated photonic lattice structure and its dependence on incident wave polarization. These measured results were compared with the calculated ones by means of photonic band and beam propagation calculations.
Scientific journal, English - Effects of symbol modulation coding on readout fidelity of shift-multiplexed holographic digital data page storage in a photopolymerizable nanoparticle-(thiol-ene)polymer composite film
Shingo Takayama; Kohta Nagaya; Keisuke Momose; Yasuo Tomita
Applied Optics, Optical Society of America, 53, 10, B53-B59, 01 Apr. 2014, Peer-reviwed, We report on shift-multiplexed holographic storage of 250 digital data pages in a photopolymerizable silica nanoparticle–polymer composite film being capable of step-growth thiol-ene polymerization in the green. Various two-dimensional symbol modulation codes for the digital data page format were employed
to examine the dependence of the readout fidelity on modulation coding schemes. It is found that, as compared to 1∶2 and 2∶4 modulation codes, higher-order 5∶9, 9∶16, and 13∶25 modulation codes possessing reduced white rates and higher coding efficiencies give lower symbol-error rates of ∼0.001 and
higher signal-to-noise ratios (>4).
Scientific journal, English - Application of holographic nanoparticle-polymer composites in neutron-optics
J. Klepp; C. Pruner; Y. Tomita; M. Fally
The 34th International Symposium on dynamical properties of solids (dyProSo XXXIV), P38, Sep. 2013
International conference proceedings, English - Far off-Bragg reply of volume holographic gratings: a comparison of experiment and theories
M. Prijatelj; J. Klepp; Y. Tomita; M. Fally
Physical Review A, 87, 063810-1 - 063810-8, Jun. 2013, Peer-reviwed
Scientific journal, English - Effects pf sirface/deep traps on third- and high-order optical nonlinearities in photopolymerizable semiconductor CdSe quantum dot-polymer nanocomposites
Y. Adachi; R. Yamagami; Y. Tomita; T. Nakashima; T. Kawai
Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference 2013 (CLEO/Europe-IQEC 2013), CE2.5, May 2013, Peer-reviwed
International conference proceedings, English - Volume holographic recording in photopolymerizable nanocomposite materials based on radical-mediated thiol-yne step-growth polymerizations
K. Mitsube; Y. Nishimura; S. Takayama; K. Nagaya; Y. Tomita
Proc. of SPIE, 8776, 87760I-1 - 87760I-21, Apr. 2013, Peer-reviwed
International conference proceedings, English - Holographic Gratings for Slow-Neutron Optics
Juergen Klepp; Christian Pruner; Yasuo Tomita; Peter Geltenbort; Irena Drevensek-Olenik; Saso Gyergyek; Joachim Kohlbrecher; Martin Fally
MATERIALS, MDPI AG, 5, 12, 2788-2815, Dec. 2012, Peer-reviwed, Recent progress in the development of holographic gratings for neutron-optics applications is reviewed. We summarize the properties of gratings recorded in deuterated (poly)methylmethacrylate, holographic polymer-dispersed liquid crystals and nanoparticle-polymer composites revealed by diffraction experiments with slow neutrons. Existing and anticipated neutron-optical instrumentations based on holographic gratings are discussed.
Scientific journal, English - Gaussian beam Z-scan analysis for nonlinear optical materials possessing simultaneous third- and fifth-order nonlinear refraction with saturable absorption: an application to semiconductor CdSe quantum dot-polymer nanocomposites
Y. Tomita; X. Liu; Y. Adachi
Proc. of SPIE, 8550, 85503G-1 - 85503G-11, Nov. 2012, Peer-reviwed
International conference proceedings, English - Three-port beam splitter for slow neutrons using holographic nanoparticle-polymer composite diffraction gratings
J. Klepp; C. Pruner; Y. Tomita; P. Geltenbort; I. Drevensek-Olenik; S. Gyergyek; J. Kohlbrecher; M. Fally
Applied Physics Letters, 101, 154104-1-3, Oct. 2012, Peer-reviwed
Scientific journal, English - Nonlinear optical responses of photopolymerizable nanocomposites capable of holographically patterning photonic lattice structures
Y. Tomita; Y. Adachi; X. Liu; J. Oshima; T. Nakashima; T. Kawai
Technical Diegest of IEEE Photonics Conference 2012, 790-791, Sep. 2012, Peer-reviwed
International conference proceedings, English - Closed-aperture Z-scan analysis for nonlinear media with saturable absorption and simultaneous third- and fifth-order nonlinear refraction
X. Liu; Y. Tomita
Physics Research International, 2012, 1-9, Aug. 2012, Peer-reviwed
Scientific journal, English - An experimental study on the validity of diffraction theories for off-Bragg replay of volume holographic gratings
M. Fally; J. Klepp; Y. Tomita
APPLIED PHYSICS B-LASERS AND OPTICS, SPRINGER, 108, 1, 89-96, Jul. 2012, Peer-reviwed, We perform experiments on the direction of the diffracted beam in off-Bragg replay for volume holographic gratings. The obtained results clearly verify the assumptions made by the first-order two-wave coupling theory for one dimensional lossless unslanted planar volume gratings using the beta-value method rather than Kogelnik's K-vector closure method.
Scientific journal, English - Shift-multiplexed holographic digital data page storage in a nanoparticle-(thiol-ene) polymer composite film
Keisuke Momose; Shingo Takayama; Eiji Hata; Yasuo Tomita
OPTICS LETTERS, OPTICAL SOC AMER, 37, 12, 2250-2252, Jun. 2012, Peer-reviwed, We demonstrate shift-multiplexed holographic storage of 180 digital data pages with low symbol-error rates in a thick (250 mu m) SiO2 nanoparticle-polymer composite film using step-growth thiol-ene photopolymerization. A two-dimensional 2:4 modulation code was employed for formatting digital data pages in order to reduce the average intensity of code block without decreasing the coding efficiency. This study clearly shows the feasibility of the thiol-ene based nanoparticle-polymer composite system as a holographic data storage medium. (C) 2012 Optical Society of America
Scientific journal, English - High-order nonlinear optical response of a polymer nanocomposite film incorporating semiconducotor CdSe quantum dots
Xiangming Liu; Yusuke Adachi; Yasuo Tomita; Juro Oshima; Takuya Nakashima; Tsuyoshi Kawai
OPTICS EXPRESS, OPTICAL SOC AMER, 20, 12, 13457-13469, Jun. 2012, Peer-reviwed, We report on observation of high-order optical nonlinearities in our recently developed photopolymerizable semiconductor CdSe quantum dot (QD)-polymer nanocomposite films at various volume fractions of CdSe QDs as high as 0.91 vol.% (3.6 wt.%). We performed Z-scan and degenerate multi-wave mixing (DMWM) measurements using a 532-nm picosecond laser delivering single 35 ps pulses at a repetition rate of 10 Hz. Using the uniformly cured polymer nanocomposite films, we observed the third-and fifth-order nonlinear optical effects in closed-aperture Z-scan measurements by which it was found that saturable nonlinear absorption (light-induced transparency) and large negative nonlinear refraction were induced. We also measured dependences of the effective third- and fifth-order nonlinear refraction constants on CdSe QD volume fraction. Based on the Maxwell-Garnett model, we estimated the third-and fifth-order nonlinear optical susceptibilities of CdSe QD and discussed a contribution of the third-order effect to the fifth-order one due to the cascaded (local-field) effect. Coexistence of the third-and fifth-order nonlinear refraction was also confirmed by DMWM. (C) 2012 Optical Society of America
Scientific journal, English - Mirrors for slow neutrons from holographic nanoparticle-polymer free-standing film- gratings
J. Klepp; C. Pruner; Y. Tomita; K. Mitsube; P. Geltenbort; M. Fally
Applied Physics Letters, 100, 214104-1-3, Jun. 2012, Peer-reviwed
Scientific journal, English - Characterization of holographic digital data page recording in nanoparticle-polymer composite films based on thol-ene photopolymerization
Y. Tomita; K. Momose; E. Hata; S. Takayama
Proc. of SPIE, 8429, 842918-1 -842918-7, Apr. 2012, Peer-reviwed
International conference proceedings, English - Computer simulation of Bragg grating formation in holographic polymer-dispersed liquid crystals based on the density functional theory
Y, Fukuda; Y. Tomita
Proc. of SPIE, 8429, 842919-1-842919-15, Apr. 2012, Peer-reviwed
International conference proceedings, English - Stoichiometric thiol-to-ene ratio dependences of refractive index modulation and shrinkage of volume gratings recorded in photopolymerizable nanoparticle-polymer composites based onstepgrowth polymerization
Eiji Hata; Yasuo Tomita
Optical Materials Express, 1, 6, 1113-1120, 01 Oct. 2011, Peer-reviwed, Spectroscopic, photocalorimetric and holographic measurements are conducted to investigate effects of stoichiometric thiol-to-ene ratio on the polymerization dynamics, refractive index modulation, recording sensitivity and polymerization shrinkage of volume gratings recorded in silica nanoparticle-polymer composite films based on step-growth radical addition polymerization. It is found that the polymerization rate of the composite system is maximized at the stoichiometric thiol-ene composition. It is also found that while the refractive index modulation and the recording sensitivity are maximized at the stoichiometric thiol-ene composition, polymerization shrinkage decreases with increasing the thiol monomer fraction. A negative correlation between gel point conversion and shrinkage is observed. © 2011 Optical Society of America.
Scientific journal, English - Application of holographic gratings recorded in nanoparticle-polymer composites as cold-neutron diffractive elements
W. Schranz; J. Klepp; C. Pruner; M. Fally; Y. Tomita; I.Drevensek-Olenik; S. Gyergyek
8th Liquid Matter Conference, P4.50, Sep. 2011, Peer-reviwed
International conference proceedings, English - Neutron diffraction by holographic gratings recorded in SiO2 nanoparticle-polymer composites
J. Klepp; C. Pruner; Y. Tomita; C. Plonka-Spehr; S. Ivanov; P. Geltenbort; J. Kohlbrecher; M. A. Ellabban; M. Fally
Physical Review A, 84, 013621-1--013621-7, Aug. 2011, Peer-reviwed
Scientific journal, English - Neutron-diffraction by holographic gratings recorded in nanoparticle-polymer composites
J. Klepp; M. Fally; C. Pruner; Y. Tomita; I. Drevensek-Olenik; S. Gyergyek
Joint Annual Meeting of the Swiss Physical Society with Swiss and Austrian Societies for Astronomy and Astrophysics, 94 (ID390), Jun. 2011
International conference proceedings, English - Holographic nanoparticle-polymer composites based on step-growth thiol-ene photopolymerization
Eiji Hata; Ken Mitsube; Keisuke Momose; Yasuo Tomita
OPTICAL MATERIALS EXPRESS, OPTICAL SOC AMER, 1, 2, 207-222, Jun. 2011, Peer-reviwed, We report on the photopolymerization kinetics and volume holographic recording characteristics of silica nanoparticle-polymer composites using thiol-ene monomers capable of step-growth polymerization. Real-time Fourier transform spectroscopy and photocalorimetry are used to characterize the visible light curing kinetics of a thiol-ene monomer system consisting of secondary dithiol with high self-life stability and low odor and triene with rigid structure and high electron density. It is shown that while the nanoparticle-(thiol-ene) polymer composites exhibit high transparency, their saturated refractive index modulation (Delta n(sat)) and material sensitivity (S) are as large as 1x10(-2) and 1615 cm/J, respectively. The polymerization shrinkage is reduced as low as 0.4% as a result of the late gelation in conversion. These values meet the acceptable values for holographic data storage media (i.e., 5x10(-3), 500 cm/J and 0.5% for Delta n(sat), S and shrinkage, respectively). It is also shown that because of the dispersion of inorganic silica nanoparticles and the use of the triene monomer having the rigid structure of the triazine functional group, the thermal stability of recorded holograms is much improved over our previously reported nanoparticle-polymer composites using organic nanoparticles and primary mercaptopropionate trithiol/allyl ether triene monomers [Opt. Lett. 35, 396 (2010)]. (C) 2011 Optical Society of America
Scientific journal, English - Stoichiometric thiol-ene ratio dependence of refractive index modulation and polymerization shrinkage in holographic nanocomposite materials
Y. Tomita; E. Hata; K. Mitsube; Y. Nishimura
ICO international conference on Information Photonics 2011, N/A, HMDA-20-1-5, May 2011, Peer-reviwed
International conference proceedings, English - Observation of higher-order optical nonlinearities in photopolymerizable semiconductor CdSe quantum dot-polymer nanocomposites
Y. Tomita; X. Liu; Y. Adachi; J. Oshima
2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, N/A, CE2.5, May 2011, Peer-reviwed
International conference proceedings, English - Photopolymerizable thiol-ene nanocomposite materials for holographic applications,
Y. Tomita; E. Hata; S. Yasui; K. Mitsube
Proc. of SPIE, 8074, 14, Apr. 2011, Peer-reviwed
International conference proceedings, English - Neutron-optical gratings from nanoparticle-polymer composites
J. Klepp; C. Pruner; M. A. Ellabban; Y. Tomita; H. Lemmel; H. Rauch; M. Fally
Nuclear Instruments and Methods in Physics Research A, 634, S59-S62, Mar. 2011, Peer-reviwed
Scientific journal, English - Nonlinear optical responses of nanoparticle-polymer composites incorporating organic (hyperbranched polymer)-metallic nanoparticle complex
X. Liu; K. Matsumura; Y. Tomita; K. Yasui; K. Kojima; K. Chikama
Journal of Applied Physics, 108, 073102-1 – 073102-9, Oct. 2010, Peer-reviwed
Scientific journal, English - Polymer-composites and polymers as beam splitters for neutrons
M. Fally; J. Klepp; C. Pruner; M. Bichler; I. Dreven; ek Olenik; Y. Tomita; J. Kohlbrecher; H. Eckerlebe
10th Austrian Polymer Meeting and 2nd Joint Austrian-Slovenian Polymer Meeting 2010, N/A, L-9, Sep. 2010, Peer-reviwed
International conference proceedings, English - Neutron optical beam splitter from holographically structured nanoparticle-polymer composites
M Fally; J. Klepp; Y. Tomita; T. Nakamura; C. Pruner; M. A. Ellabban; R. A. Rupp; M. Bichler; I. D. Olenik; J. Kohlbrecher; H. Eckerlebe; H. Lemmel; H. Rauch
Physical Review Letters, 105, 12, 123904-1 – 123904-4, Sep. 2010, Peer-reviwed
Scientific journal, English - 1D Photonic Lattice Structures Fabricated by Holographic Assembly of Semiconductor Quantum Dots in Photopolymer films
X. Liu; Y. Tomita; J. Oshima; K. Chikama; T. Nakashima; T. Kawai
Technical Digest of OEEC 2010, 7E2-4, Jul. 2010, Peer-reviwed
International conference proceedings, English - Neutron-diffraction by holographic gratings recorded in nanoparticle-polymer composites
J. Klepp; M. Fally; C. Pruner; Y. Tomita; I. Dreve; ek Olenik; S. Gyergyek
5th European Conference on Neutron Scattering, N/A, N/A, Jul. 2010, Peer-reviwed
International conference proceedings, English - Holographic patterning of Semiconductor quantum dots in polymer for constructing photonic lattice structures
X. Liu; Y. Tomita; J. Oshima; K. Chikama; T. Nakashima; T. Kawai
Technical Digest of CLEO/QELS 2010, CThL2, May 2010, Peer-reviwed
International conference proceedings, English - Z-scan characterization of nonlinear optical effects in polymer films incorporating hyperbranched polymer-metallic nanoparticle complex
X. Liu; Y. Tomita; K Yasui; K. Kojima; K. Chikama
Proc. of SPIE, 7722, 77222A-1- 77222A-11, Apr. 2010, Peer-reviwed
International conference proceedings, English - Low polymerization-shrinkage nanoparticle-polymer composite films based on thiol-ene photopolymerization for holographic data storage
Y. Tomita; E. Hata; K. Omura; S. Yasui
Proc. of SPIE, 7722, 772229-1- 772229-7, Apr. 2010, Peer-reviwed
International conference proceedings, English - Order-of-magnitude polymerization-shrinkage suppression of volume gratings recorded in nanoparticle-polymer composites
E. Hata; Y. Tomita
Optics Letters, 35, 396 – 398, Feb. 2010, Peer-reviwed
Scientific journal, English - Spatial and temporal evolution of transient stimulated-Brillouin-scattering slow-light pulse in an optical fiber
L. Ren; Y. Yang; W. Zhao; Y. Tomita
Proc. of SPIE, 7612, 761207-1 - 761207-8, Jan. 2010, Peer-reviwed
International conference proceedings, English - Electrical tuning of two-dimensional honeycomb photonic lattices using holographic polymer-dispersed liquid crystals
R. Ohira; M. Miki; Y. Tomita
Proc. of SPIE, 7618, 761813-1 - 761813-10, Jan. 2010, Peer-reviwed
International conference proceedings, English - Photopolymerization kinetics and volume holographic recording in ZrO2 nanoparticle-polymer composites at 404 nm
K. Omura; Y. Tomita
Journal of Applied Physics, 107, 023107-1 – 023107-6, Jan. 2010, Peer-reviwed
Scientific journal, English - Holographic assembly of semiconductor CdSe quantum dots in polymer for volume Bragg grating structures with diffraction efficiency near 100%
X. Liu; Y. Tomita; J. Oshima; K. Chikama; K. Matsubara; T. Nakashima; T. Kawai
Applied Physics Letters, 95, 261109-1 – 261109-3, Dec. 2009, Peer-reviwed
Scientific journal, English - Holographic nanoparticle-polymer composites for photonics and neutron optics
Yasuo Tomita
Technical Digest of the eighth Japan-Finland Joint Symposium on Optics in Engineering (OIE'09), 87-88, Sep. 2009, Peer-reviwed
International conference proceedings, English - Nonlinear optical properties of hyperbranched polymer-metallic nanoparticle complex in a polymer film and organic solution
X. Liu; Y. Tomita; K. Yasui; K. Kojima
Technical Digest of the eighth Japan-Finland Joint Symposium on Optics in Engineering (OIE'09), 145-146, Sep. 2009, Peer-reviwed
International conference proceedings, English - Holographically prepared diffraction grating for neutron interferometry
J. Klepp; C.Pruner; M.Fritzenwanker; H.Rauch; T. Nakamura; Y. Tomita; M.Fally
Proceedings of oint Annual Meeting of the Austrian Physical Society, the Swiss Physical Society and the Austrian Society for Astronomy and Astro-Physics, 167, Sep. 2009, Peer-reviwed
International conference proceedings, English - Characterization of hologram multiplexing in nanoparticle-polymer composites
S. Koda; E. Hata; Y. Tomita
Proceedings of SPIE, 7402-31, Aug. 2009, Peer-reviwed
International conference proceedings, English - Blue-sensitive nanoparticle-polymer composites for volume holographic recording
K. Omura; K. Gotoh; Y. Tomita; K. Ohmori; M. Hidaka
Proceedings of SPIE, 7402X-1 – 7402X-8, Aug. 2009, Peer-reviwed
International conference proceedings, English - Transient and nonlinear analysis of slow-light pulse propagation in an optical fiber via stimulated Brillouin scattering
Liyong Ren; Yasuo Tomita
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, OPTICAL SOC AMER, 26, 7, 1281-1288, Jul. 2009, Peer-reviwed, We investigate slow-light pulse propagation in an optical fiber via transient stimulated Brillouin scattering. Space-time evolution of a generating slow-light pulse is numerically calculated by solving three-wave coupled-mode equations between a pump beam, an acoustic wave, and a counterpropagating signal pulse. Our mathematical treatments are applicable to both narrowband and broadband pump cases. We show that the time delay of 85% pulse width can be obtained for a signal pulse of the order of subnanosecond pulse width by using a broadband pump, while the signal pulse is broadened only by 40% of the input signal pulse. The physical origin of the pulse broadening and distortion is explained in terms of the temporal decay of the induced acoustic field. (C) 2009 Optical Society of America
Scientific journal, English - Volume holographic recording in nanoparticle-polymer composites with reduced polymerization shrinkage
E. Hata; S. Koda; K. Gotoh; Y. Tomita
Technical Digest of CLEO-Europe 2009, CC2.2-THU, Jun. 2009, Peer-reviwed
International conference proceedings, English - Holographically prepared diffraction gratings in nanoparticle dispersed polymers for neutron optics
M. Fally; M.A. Ellabban; I.D. Olenik; Y. Tomita; T. Nakamura; M. Bichler; R.A. Rupp; H. Eckerlebe
Proceedings of the 12th Topical Meeting on Photorefractive Effects, Materials, and Devices - Control of Light and Matter (PR09), 200-201, Jun. 2009, Peer-reviwed
International conference proceedings, English - Photonic nanocomposite materials for holographic data storage
Y. Tomita
Technical Digest of Optical Data Storage 2009, 82-83, May 2009, Peer-reviwed
International conference proceedings, English - Holographic recording sensitivity enhancement of ZrO2 nanoparticle-polymer composites by hydrogen donor and acceptor agents
T. Nakamura; J. Nozaki; Y. Tomita; K. Ohmori; M. Hidaka
Journal of Optics A: Pure Applied Optics, 11, 024010, Feb. 2009, Peer-reviwed
Scientific journal, English - SBS-based slow light in optical fibers: optimum design considerations for undistorted slow-light signal propagation in small and large signal regimes
L. Ren; Y. Tomita
Proc. of SPIE, 7226-7, Jan. 2009, Peer-reviwed
International conference proceedings, English - Improved thermal stability of volume holograms recorded in nanoparticle-polymer composite films
Yasuo Tomita; Toshihiro Nakamura; Atsushi Tago
OPTICS LETTERS, OPTICAL SOC AMER, 33, 15, 1750-1752, Aug. 2008, Peer-reviwed, We examine thermal distortions of volume holograms recorded in (meth)acrylate photopolymers doped with SiO2 or ZrO2 nanoparticles. A holographic method is used to evaluate the temperature-induced Bragg-angle detuning of recorded volume holograms as a result of thermally induced refractive index and dimensional changes. It is found that the incorporation of inorganic nanoparticles into photopolymer leads to the effective suppression of these thermal changes, thereby extending the range of operating temperatures for their use in photonic applications. (C) 2008 Optical Society of America.
Scientific journal, English - ZrO2 nanoparticle-polymer composite media for volume holographic recording
T. Nakamura; S. Koda; K. Ohmura; Y. Tomita
Technical Digest of the Joint International Symposium on Optical Memory and Optical Data Storage 2008 (ISOM/ODS 2008), 56-58, Jul. 2008, Peer-reviwed
International conference proceedings, English - Zero-broadening SBS slow light propagation in an optical fiber using two broadband pump beams
S. Wang; L. Ren; Y. Liu; Y. Tomita
Optics Express, 16, 8067-8076, Jun. 2008, Peer-reviwed
Scientific journal, English - Three-dimensional confocal Raman imaging of volume holograms formed in ZrO2 nanoparticle-photopolymer composite materials
K. Chikama; K. Mastubara; S. Oyama; Y. Tomita
Journal of Applied Physics, 103, 113108-1 -113108-6, Jun. 2008, Peer-reviwed
Scientific journal, English - Reducing GVD-dependent broadening of SBS slow light in an optical fiber by use of a single pump laser
L. Ren; Y. Tomita
Journal of the Optical Society of America B, 25, 741-746, May 2008, Peer-reviwed
Scientific journal, English - Distortion management of SBS slow light in a single-mode optical fiber by optimization of broadband SBS gain spectrum
L. Ren; Y. Tomita
Proc. of SPIE, 6994, 6994-17, Apr. 2008, Peer-reviwed
International conference proceedings, English - On the thermal stability of volume holograms recorded in nanoparticle-polymer composite films
Y. Tomita; T. Nakamura; A. Tago
Proc. of SPIE, 6994, 6994-30, Apr. 2008, Peer-reviwed
International conference proceedings, English - Holographic scattering in SiO2 nanoparticle-dispersed photopolymer films
Naoaki Suzuki; Yasuo Tomita
APPLIED OPTICS, OPTICAL SOC AMER, 46, 27, 6809-6814, Sep. 2007, Peer-reviwed, We describe an experimental study of holographic (coherent) scattering due to parasitic noise gratings recorded in SiO2 nanoparticle-dispersed photopolymer films. Dependences of film thickness and nanoparticle concentration on holographic scattering losses are evaluated. It is shown that the geometric feature of the holographic scattering pattern in the two-beam recording setup can be explained by the Ewald sphere construction. It is found that holographic scattering becomes noticeable when a film with nanoparticle concentrations higher than 10 vol.% is thicker than 100 mu m. The significance of holographic scattering in the characterization of a volume grating recorded in a thick (>100 mu m) nanoparticle-dispersed photopolymer film is also discussed. (C) 2007 Optical Society of America.
Scientific journal, English - Holographic assembly of nanoparticles in polymers for 3D recording and patterning
Y. Tomita; N. Suzuki; Y. Endoh; S. Kurozumi; M. Miki; K. Chikama
Proceedings of SPIE, 6657, 665702-1 - 6657027, Aug. 2007, Peer-reviwed
International conference proceedings, English - Nanoparticle-photopolymer composites for holographic applications
Y. Tomita
Techinical Digest of CLEO-Europe 2007, CC1-1-THU, Jun. 2007, Peer-reviwed
International conference proceedings, English - Temperature-dependent anisotropic grating formation in a holographic polymer-dispersed liquid crystal
H. Iioka; W. Weng; A. Yamahata; Y. Tomita
Techinical Digest of CLEO-Europe 2007, CC-11-WED, Jun. 2007, Peer-reviwed
International conference proceedings, English - Characterization of volume gratings formed in ZrO2 nanoparticle-dispersed photopolymers
N. Suzuki; Y. Tomita; K. Ohmori; M. Hidaka; K. Chikama
Techinical Digest of CLEO-Europe 2007, CC-20-WED, Jun. 2007, Peer-reviwed
International conference proceedings, English - UV-light-induced one-color and two-color photorefractive effects in congruent and near-stoichiometric LiNbO3 : Mg crystals
Haijun Qiao; Jingjun Xu; Yasuo Tomita; Dengsong Zhu; Bo Fu; Guoquan Zhang; Guangyin Zhang
OPTICAL MATERIALS, ELSEVIER SCIENCE BV, 29, 7, 889-895, Mar. 2007, Peer-reviwed, We describe the ultraviolet-light one-color photorefraction (UV-OPR) at 351 run in LiNbO3 crystals with different Mg-doping concentrations and [Li]/[Nb] ratios. It is shown that as the Mg-doping concentration and/or the [Li]/[Nb] ratio increase, the refractive index change and the two-beam coupling gain increase but the response time decreases. It is also shown that the recording sensitivity as large as similar to 27 cm/J is obtainable at a recording intensity of similar to 1 W/cm(2) in near-stoichiometric LiNbO3 doped with 2 mol% Mg. This sensitivity is approximately one order of magnitude higher than those for other LiNbO3 crystals. We also describe the ultraviolet-light-gating two-color photorefraction (UV-TPR) using 365 nm gating and 633 nm recording beams in LiNbO3 crystals with different Mg-doping concentrations and [Li]/[Nb] ratios. It is shown that UV-TPR is only observed in near-stoichiometric crystals and the grating-formation dynamics strongly depend on the Mg concentration. (c) 2006 Elsevier B.V. All rights reserved.
Scientific journal, English - Holographic assembly of nanoparticles in photopolymers for photonic applications
Yasuo Tomita
SPIE Newsroom, DOI: 10.1117/2.1200612.0475, Jan. 2007, Peer-reviwed
Scientific journal, English - Highly transparent ZrO2 nanoparticle-dispersed acrylate photopolymers for volume holographic recording
Naoaki Suzuki; Yasuo Tomita
OPTICS EXPRESS, OPTICAL SOC AMER, 14, 26, 12712-12719, Dec. 2006, Peer-reviwed, We demonstrate and characterize volume holographic recording in ZrO2 nanoparticle-dispersed acrylate photopolymer films that have very low scattering loss. More than thirty-fold reduction in the scattering coefficient, as compared with those of previously reported TiO2 nanoparticle-dispersed photopolymers, is achieved. It is shown that the refractive index modulation as high as 5.3 x 10(-3), together with substantive photopolymerization-shrinkage suppression, is obtained at the nanoparticle concentration of 15 vol.%. Dependences of nanoparticle concentration and grating spacing on the refractive index modulation are also investigated. (C) 2006 Optical Society of America.
Scientific journal, English - Electron-probe micro-analysis of a volume hologram recorded in a nanoparticle-dispersed photopolymer film
K. Chikama; Y. Nohara; S. Oyama; Y. Endoh; N. Suzuki; K. Furushima; Y. Tomita
Proceedings of the 16th International Microscopy Congress, 1954, Sep. 2006, Peer-reviwed
International conference proceedings, English - Nanoparticle-dispersed photopolymers for holographic applications
Y. Tomita; Y. Endoh; K. Furushima; N. Suzuki; J. Nozaki
Proceeding of International Commission for Optics (ICO) Topical Meeting on Optoinformatics/Information Photonics 2006, 80, Sep. 2006, Peer-reviwed
International conference proceedings, English - A phenomenological mutual diffusion model for holographic grating formation in nanoparticle-dispersed photopolymers
Y. Endoh; K. Furushima; Y. Tomita
Technical Digest of 12th Microoptics Conference (MOC ’06), 114, Sep. 2006, Peer-reviwed
International conference proceedings, English - Diffraction properties of holographic recording in zirconia nanoparticle-dispersed photopolymer films
N. Suzuki; Y. Tomita; K. Ohmori; M. Hidaka; K. Chikama
Technical Digest of 12the Microoptics Conference (MOC ’06), 116, Sep. 2006, Peer-reviwed
International conference proceedings, English - Holographic recording in methacrylate photopolymer film codoped with benzyl n-butyl phthalate and silica nanoparticles
H Takahashi; T Naito; Y Tomita
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 45, 6A, 5023-5026, Jun. 2006, Peer-reviwed, Transmission volume holo-rams recorded in methacrylate photopolymer films codoped with benzyl n-butyl phthalate (BBP) and silica nanoparticles are studied. It is found that BBP, which is a well-known plasticizer, can be directly mixed with methacrylate monomer and that a refractive index modulation as high as similar to 0.006 is recorded with a BBP concentration of 36 vol%. It is also found that the additional dispersion of silica nanoparticles substantially suppresses polymerization shrinkage without increasing optical scattering loss.
Scientific journal, English - Ultraviolet-light-induced absorption changes in highly Zn-doped LiNbO3
HJ Qiao; Y Tomita
OPTICS EXPRESS, OPTICAL SOC AMER, 14, 12, 5773-5778, Jun. 2006, Peer-reviwed, Ultraviolet-light-induced absorption (UVLIA) in a highly Zn-doped LiNbO3 crystal is studied at room temperature with various probe wavelengths from the violet to the near-infrared spectral regions. Transient dark buildup of UVLIA is observed in the violet-blue (< 500 nm) region, while such a phenomenon is yet absent in the green-red (> 500 nm) region. It is found that the temporal evolution of UVLIA in the dark is well described by a sum of two stretched exponential functions. These results are explained in terms of a three-level model involving two types of hole-trapped O-levels and one unintentional impurity FeLi level. (c) 2006 Optical Society of America.
Scientific journal, English - Nanocomposite photopolymers doped with nanoparticles for volume holographic recording
Y. Tomita; Y. Endoh; K. Furushima; J. Nozaki
Technical Digest of SPIE International Conference on Application of Photonic Technology (Photonics North 2006), June, Jun. 2006, Peer-reviwed
International conference proceedings, English - Two-dimensional imaging of atomic distribution morphology created by holographically induced mass transfer of monomer molecules and nanoparticles in a silica-nanoparticle-dispersed photopolymer film
Y Tomita; K Chikama; Y Nohara; N Suzuki; K Furushima; Y Endoh
OPTICS LETTERS, OPTICAL SOC AMER, 31, 10, 1402-1404, May 2006, Peer-reviwed, We report an electron-probe microanalysis of a hologram recorded in a silica-nanoparticle-dispersed photo-polymer film. We used S and Si atoms as label elements to identify formed polymer and nanoparticle species, respectively. It is found that the periodic density distributions of S and Si atoms are out of phase with each other, indicating that those of the formed polymer and nanoparticles are out of phase each other. This result shows decisive evidence of the mutual diffusion of monomer molecules and silica nanoparticles in the film under holographic two-beam interference exposure. (c) 2006 Optical Society of America
Scientific journal, English - Volume holographic recording in multi-component photopolymers with hyperbranched polymers as organic nanoparticles
Y. Tomita; K. Furushima; Y. Endoh; M. Hidaka; K; Ohmori; K. Chikama
Proc. of SPIE, 6187, 618702-4-618702-10, Apr. 2006, Peer-reviwed
International conference proceedings, English - Organic nanoparticle (hyperbranched polymer)-dispersed photopolymers for volume holographic storage
Y. Tomita; K. Furushima; K. Ochi; K. Ishizu; A. Tanaka; M. Ozawa; M. Hidaka; K. Chikama
Applied Physics Letters, 88, Feb. 2006, Peer-reviwed
Scientific journal, English - Real-time phase-shift measurement during formation of a volume holographic grating in nanoparticle-dispersed photopolymers
Naoaki Suzuki; Yasuo Tomita
Applied Physics Letters, 88, 011105-1 - 011105-3, Jan. 2006, Peer-reviwed
Scientific journal, English - Holographic control of nanoparticle-distribution morphology in photopolymers for volume holographic recording and nonlinear optics
Yasuo Tomita; Naoki Suzuki; Yutaka Endoh
Technical Digest of the sixth Japan-Finland Joint Symposium on Optics in Engineering (OIE'05), 23-24, Sep. 2005, Peer-reviwed
International conference proceedings, English - Observation of strong stimulated photorefractive scattering and self-pumped phase conjugation in LiNbO3 : Mg in the ultraviolet
H Qiao; Y Tomita; JJ Xu; Q Wu; GQ Zhang; GY Zhang
OPTICS EXPRESS, OPTICAL SOC AMER, 13, 19, 7666-7671, Sep. 2005, Peer-reviwed, We report on the observation of diffusion-dominant photorefraction and light-induced nonlinear backward scattering in highly Mg-doped LiNbO3 at 351 nm. We also demonstrate what we believe to be the first continuous-wave self-pumped phase conjugation via stimulated photorefractive backscattering in the ultraviolet. (c) 2005 Optical Society of America.
Scientific journal, English - Volume holographic recording based on mass transport of nanoparticles doped in methacrylate photopolymers
Yasuo Tomita; Naoaki Suzuki; Kouji Furushima; Yutaka Endoh
Proceedings of SPIE Optics & Photonics 2005 Symposium 5939-10, AM05-NP426-9, Aug. 2005, Peer-reviwed
International conference proceedings, English - Ultraviolet-light-induced nonlinear Ultraviolet-light-induced nonlinear Ultraviolet-light-induced nonlinear scattering and self-pumped phase conjugation in LiNbO3:Mg crystals at 351 nm
H.Qiao; J.Xu; Q.Wu; X.Yu; G.Zhang; Y.Tomita
Technical Digest of IQEC-CLEO Pacific Rim, CFI1-4, Jul. 2005, Peer-reviwed
International conference proceedings, English - Holographic manipulation of nanoparticle-distribution morphology in photopolymers and its applications to volume holographic recording and nonlinear photonic crystals
Y. Tomita
Proceedings of PR05, Trends in Optics and Photonics (TOPS), 274-280, Jul. 2005, Peer-reviwed
International conference proceedings, English - On the dark-decay behaviors of photorefractive gratings in magnesium doped near-stoichiometric ligium niobate crystals at 351 nm
H. Qiao; J. Xu; G. Zhang; D. Zhu; X. Yu; G.Zhang; W. Li; X. Yu; Y. Tomita
Proceedings of PR05, Trends in Optics and Photonics (TOPS), 91-95, Jul. 2005, Peer-reviwed
International conference proceedings, English - Organic-nanoparticle dispersed photopolymers for volume holographic recording
Y. Tomita; K. Furushima; K. Ishizu
Technical Digest of CLEO-Europe, CC2-1-MON, Jun. 2005, Peer-reviwed
International conference proceedings, English - Silica-nanoparticle-dispersed methacrylate photopolymers that include transmparent plastics as a binder host
H. Takahashi; J. Yamauchi; Y. Tomita
Technical Digest of CLEO-Europe, CE-3-TUE, Jun. 2005, Peer-reviwed
International conference proceedings, English - Holographic manipulation of nanoparticle distribution morphology in nanoparticle-dispersed photopolymers
Y Tomita; N Suzuki; K Chikama
OPTICS LETTERS, OPTICAL SOC AMER, 30, 8, 839-841, Apr. 2005, Peer-reviwed, We report on experimental verification of mass transfer of nanoparticles during holographic recording in nanoparticle-dispersed photopolymers. Through direct observations of the microscopic structure of recorded holograms as well as optical measurements of the phase shift between the light interference pattern and a recorded hologram we find that holographic exposure causes nanoparticles to be redistributed from bright to dark regions, leading to periodic assembly of nanoparticles and thereby to formation of high-contrast holograms. (c) 2005 Optical Society of America.
Scientific journal, English - Characterization of silica-nanoparticle-dispersed photopolymer films that include Poly(methyl methacrylate) as host binder material
H.Takahashi; J. Yamauchi; Y.Tomita
Japanese Journal of Applied Physics, 41, L1008-L1010, 2005, Peer-reviwed
Scientific journal, English - ナノ微粒子分散フォトポリマーに記録された体積ホログラムの回 折特性
鈴木直昭; 富田康生
東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第１回公開シンポジウム講演資料, 40, Dec. 2004 - ナノ微粒子分散フォトポリマー膜の多層化によるフォトニックデバイスの創製
高橋啓司; 山内淳也; 富田康生
東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第１回公開シンポジウム講演資料, 39, Dec. 2004
Japanese - Ultraviolet-light sensitization of near-infrared photorefractivity in Mg-doped stoichiometric LiNbO3 for nonvolatile one-color holography
WW Zou; R Matsushima; Y Tomita; GQ Zhang
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 43, 11A, 7491-7494, Nov. 2004, Peer-reviwed, We demonstrate near-infrared one-color nonvolatile photorefractivity in stoichiometric LiNbO3 doped with Mg above threshold under ultraviolet (UV)-light preexposure. The dynamics of the diffraction efficiency and two-beam coupling during the recording and fixing processes are investigated. It is found that the dynamics of the grating buildup and fixing processes are strongly dependent on the writing time, which can be explained qualitatively by the proposed two-center model. A recording sensitivity as high as 0.23cm/J is obtained at 780nm.
Scientific journal, English - Near-infrared one-color photorefractivity in Mg-doped near-stoichiometric LiNbO3 with quasi-nonvolatile readout
Weiwen Zou; Ryo Matsushima; Yasuo Tomita
Technical Digest of the 2004 International Commission for Optics (ICO'04), 369-370, Jul. 2004, Peer-reviwed
International conference proceedings, English - Holographic recording in nanoparticles-dispersed photopolymer films
Naoaki Suzuki; Yasuo Tomita
Technical Digest of the 2004 International Commission for Optics (ICO'04), 421-422, Jul. 2004, Peer-reviwed
International conference proceedings, English - Organic-inorganic nanocomposite for holographic recording with net diffraction efficiency near 100%
Yasuo Tomita
Technical Digest of the 2004 International Commission for Optics (ICO'04), 265-266, Jul. 2004, Peer-reviwed
International conference proceedings, English - UV-light-gating two-color photorefractivity in Mg-doped near-stoichiometric LiNbO3
Yasuo Tomita; Ryo Matstushima; Weiwen Zou; Guoquan Zhang
Technical Digest of the 2004 Conference on Lasers and Electro-Optics (CLEO2004), CMT2, May 2004, Peer-reviwed
International conference proceedings, English - Silica-nanoparticle-dispersed methacrylate photopolymers with net diffraction efficiency near 100%
N Suzuki; Y Tomita
APPLIED OPTICS, OPTICAL SOC AMER, 43, 10, 2125-2129, Apr. 2004, Peer-reviwed, We demonstrate volume holographic recording in silica-nanoparticle-dispersed methacrylate photopolymers with reduced scattering loss as low as 2%. This is made possible by use of 13-nm silica nanoparticles. As a result a net diffraction efficiency near 100% is achieved for a transmission volume hologram of 45-mum thickness. Grating buildup dynamics are measured for various nanoparticle concentrations, and the effects of nanoparticle size on refractive-index modulation and polymerization shrinkage are also evaluated. (C) 2004 Optical Society of America.
Scientific journal, English - Ultraviolet-light-gating two-color photorefractive effect in Mg-doped near-stoichiometric LiNbO3
Y Tomita; S Sunarno; GQ Zhang
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, OPTICAL SOC AMER, 21, 4, 753-760, Apr. 2004, Peer-reviwed, We investigate the ultraviolet-(UV-) light-induced two-color photorefractivity in a near-stoichiometric LiNbO3 crystal doped with Mg above the damage-resistant threshold concentration. Measurements of holographic recording and optical fixing dynamics with, a 365-nm gating beam show that complementary shallow and deep gratings are formed during recording and that at least four defect centers are involved in the two-color holographic recording process. It is confirmed that UV-light-induced defect centers O- responsible for the broads band absorption changes act as shallow centers in UV-light-gating two-color holography. These findings indicate that the physical mechanism of the UV-light-gating two-color photorefractive effect in the crystal is essentially different from that of the recently reported two-color photorefractive effect in Mg-doped near-stoichiometric LiNbO3 with a 488-mn gating beam [Appl. Opt. 41, 4891 (2002)]. (C) 2004 Optical Society of America.
Scientific journal, English - Nanoparticle-dispersed photopolymer films for holographic recording with diffraction efficiency near 100 %
Yasuo Tomita; Naoaki Suzuki; Katsumi Chikama
Technical Digest of Particles 2004, 65, Mar. 2004, Peer-reviwed
International conference proceedings, English - Photonic recording materials
Yasuo Tomita
電気通信大学２１世紀COEプログラム「コヒーレント光科学の展開」第１回公開シンポジウム講演予稿集, 25-28, Dec. 2003
English - Two-color photorefractive effect in near-stoichiometric LiNbO3 doped with magnesium
Yasuo Tomita; Weiwen Zou
電気通信大学２１世紀COEプログラム「コヒーレント光科学の展開」第１回公開シンポジウム講演予稿集, 79-80, Dec. 2003
English - Diffraction Properties of Volume Holograms Recorded in SiO2 Nanoparticle-Dispersed Methacrylate Photopolymer Films
Naoaki Suzuki; Yasuo Tomita
Japanese Journal of Applied Physics, 42, L927-L929, Aug. 2003, Peer-reviwed
Scientific journal, English - Improvement of holographic recording sensitivities in the green in SiO2 nanoparticle-dispersed methacrylate photopolymers doped with pyrromethene dyes
Y Tomita; H Nishibiraki
APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 83, 3, 410-412, Jul. 2003, Peer-reviwed, We demonstrate more than one-order-of-magnitude improvement of holographic recording sensitivities in the green by doping pyrromethene dyes into SiO2 nanoparticle-dispersed methacrylate photopolymer films. Holographic recording dynamics are measured for several dye concentrations and writing intensities. It is found that there exists the optimum writing intensity for a given dye concentration to maximize the diffraction efficiency. Noticeable hologram-apodization phenomena caused by the longitudinal refractive-index changes are also observed in the Bragg-angle selectivity curve. (C) 2003 American Institute of Physics.
Scientific journal, English - Ultraviolet-light-induced near-infrared photorefractivity and two-color holography in highly Mg-doped LiNbO3
GQ Zhang; Y Tomita
JOURNAL OF APPLIED PHYSICS, AMER INST PHYSICS, 93, 12, 9456-9459, Jun. 2003, Peer-reviwed, We investigate the ultraviolet (UV)-light-induced transient photorefractivity in a highly Mg-doped LiNbO3 crystal. The thermal activation energy of the UV-light-induced defect centers responsible for the induced transient photorefractivity was measured to be 0.65 eV and holes were found to be the major charge carriers. These results provide a solid basis for the model that intermediate states O- are the UV-light-induced defect centers in the crystal. We also demonstrate quasinondestructive two-color holography using UV-light-induced transient photorefractivity. The two-color recording sensitivity was measured to be as high as 0.05 cm/J with a recording intensity of 5 W/cm(2) at 780 nm and a gating intensity of 0.47 W/cm(2) at 365 nm. (C) 2003 American Institute of Physics.
Scientific journal, English - Light-induced absorption changes in in-doped congruent LiNbO3
S Sunarno; Y Tomita; G Zhang
APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 81, 24, 4505-4507, Dec. 2002, Peer-reviwed, We investigate visible and near-infrared light-induced absorption changes caused by intrinsic defect centers in congruently melting and reduced LiNbO3:In with a single-shot picosecond pulse at 532 nm. It is found that the dark decay dynamics of optically induced shallow centers strongly depend on In concentrations. Two types of optically induced shallow centers having dark decay time constants on the orders of milliseconds and tens of microseconds are observed in LiNbO3 doped with In below the damage-resistant threshold concentrations. Only one of the two types is observed in LiNbO3 doped with In above it. The origin of these shallow centers is also discussed. (C) 2002 American Institute of Physics.
Scientific journal, English - Holographic recording in TiO2 nanoparticle-dispersed methacrylate photopolymer films
N Suzuki; Y Tomita; T Kojima
APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 81, 22, 4121-4123, Nov. 2002, Peer-reviwed, We demonstrate permanent holographic storage in the green with high diffraction efficiency and recording sensitivity in TiO2 nanoparticle-dispersed methacrylate photopolymer films. It is shown that the diffraction efficiency as well as the recording sensitivity significantly increase with an increase of nanoparticle concentration. It is also found that volumetric shrinkage during holographic exposure is noticeably suppressed by inclusion of the nanoparticles. (C) 2002 American Institute of Physics.
Scientific journal, English - Near-infrared holographic recording with quasi-nonvolatile readout in LiNbO3 : In,Fe
GQ Zhang; Y Tomita; XZ Zhang; JJ Xu
APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 81, 8, 1393-1395, Aug. 2002, Peer-reviwed, We investigate near-infrared photorefractivity and the dynamics of refractive index grating buildup and readout processes in reduced LiNbO3:In,Fe. High asymmetry in grating buildup and readout erasure rates is observed. This remarkable property makes the recorded grating quasinonvolatile during readout. The reason for the high asymmetry is explained qualitatively in terms of a multiple-defect-center model. (C) 2002 American Institute of Physics.
Scientific journal, English - Nondestructive two-color holography in LiNbO3:Mg by use of ultraviolet-induced absorption
G.Zhang; Y.Tomita
Technical digest of the 19th Congress of the International Commission for Optics (ICO-19), August, 2002, Firenze, Italy, SPIE Proceedings, 367-398, Aug. 2002, Peer-reviwed
International conference proceedings, English - Holographic grating formation in nanoparticle-dispersed methacrylate photopolymer films
T. Kojima; N.Suzuki; Y. Tomita
Technical Digest of the 2002 Conference on Lasers and Electro-Optics (CLEO2002), May, 2002, Long Beach, California, U.S.A, 37-38, May 2002, Peer-reviwed
International conference proceedings, English - Quasi-nonvolatile one-color holography in LiNbO3:In,Fe
G.Zhang; Y.Tomita; X.Zhang; J.Xu
Technical Digest of the 2002 Conference on Lasers and Electro-Optics (CLEO2002), May, 2002, Long Beach, California, U.S.A., 273, May 2002, Peer-reviwed
International conference proceedings, English - Broadband absorption changes and sensitization of near-infrared photorefractivity induced by ultraviolet light in LiNbO3 : Mg
GQ Zhang; Y Tomita
JOURNAL OF APPLIED PHYSICS, AMER INST PHYSICS, 91, 7, 4177-4180, Apr. 2002, Peer-reviwed, We observe ultraviolet-light-induced absorption changes in spectral regions from the near-ultraviolet to the near-infrared in as-grown LiNbO3:Mg. Such a broad light-induced absorption band is unstable at room temperature and decays nonmonoexponentially in the dark with a time constant on the order of tens of seconds. We attribute the appearance of the broadband light-induced absorption to the creation of the intermediate state O- in which holes excited from deep defect centers are trapped at O2- sites near cation vacancies. It is also found that near-infrared photorefractive sensitivities increase by several orders of magnitude by pre-exposing the crystal to incoherent ultraviolet light. These properties may be useful for an application of LiNbO3:Mg to nonvolatile two-color holography. (C) 2002 American Institute of Physics.
Scientific journal, English - Characterization of index and surface-relief gratings formed in methacrylate photopolymers
Takashi Kojima; Yasuo Tomita
Optical Review, Optical Society of Japan, 9, 5, 222-226, 2002, Peer-reviwed, We report on an experimental investigation of the dual (index and surface-relief) grating formation in methacrylate photopolymers in the green. It is found that the dynamics of the diffracted signal from high spatial frequency dual gratings recorded in a thin film sample is mainly determined by the evolution of the volume index grating and is strongly dependent on writing intensities. Low spatial frequency dual gratings recorded in a bulk sample are also investigated. Depth profile and magnitude of the index grating are estimated quantitatively from the diffraction efficiency as a function of polish depth from the bulk sample's surface. It is confirmed that the surface-relief grating is dominant in the light diffraction from the bulk sample.
Scientific journal, English - Characterization of two-color holography performance in reduced LiNbO3 : In
GQ Zhang; S Sunarno; M Hoshi; Y Tomita; CH Yang; WS Xu
APPLIED OPTICS, OPTICAL SOC AMER, 40, 29, 5248-5252, Oct. 2001, Peer-reviwed, The two-color recording sensitivity S and the figure of merit M/# are measured in a reduced and congruent LiNbO3:In crystal of 2.2-mm thickness. The results are compared with those before reduction treatment. It is found that S increases by an order of magnitude through reduction treatment but the M/# is unchanged. Measured values for S and M/# in the reduced crystal are found to be 3 x 10(-3) cm/J and 0.04, respectively, with a total writing intensity of 4.0 W/cm(2) at 780 nm and a gating intensity of 1.15 W/cm(2) at 488 nm. These values are close to those of near-stoichiometric LiNbO3 Crystals under similar recording conditions. We also show that photoconductivity plays an important role in the improvement of S in LiNbO3:In. (C) 2001 Optical Society of America.
Scientific journal, English - Observation of very slow dark decay of light-induced charges on shallow levels in LiNbO_3_:Mg
G.Zhang; Y.Tomita
Technical Digest of the 2001 Conference on Lasers and Electro-Optics (CLEO2001), May, 2001, Baltimore, Maryland, U.S.A., 510-511, May 2001, Peer-reviwed
International conference proceedings, English - Improvement of two-color holography performance in congruent lithium niobate by doping with In
G.Zhang; Y.Tomita; W.Xu; C.Yang
Technical Digest of the 2001 Conference on Lasers and Electro-Optics (CLEO2001), May, 2001, Baltimore, Maryland, U.S.A., 511-512, May 2001, Peer-reviwed
International conference proceedings, English - Near-infrared holographic recording in LiNbO3 : In,Fe with high resistance against readout erasure
GQ Zhang; Y Tomita; XZ Zhang; JJ Xu
CLEO(R)/PACIFIC RIM 2001, VOL II, TECHNICAL DIGEST, IEEE, 448-449, 2001, Peer-reviwed, We demonstrate near-infrared holographic recording and observe very long decay behavior of the grating during readout at 780 rim, in a LiNbO3:In,Fe crystal. An increase of the saturated light-induced refractive index change with increasing recording intensities is also observed.
International conference proceedings, English - Nonvolatile two-color holographic recording in Er-doped LiNbO_3_
Y.Tomita; M.Hoshi; S.Sunarno
Japanese Journal of Applied Physics, 40, L1035-L1037, 2001, Peer-reviwed
Scientific journal, English - Nonvolatile two-color holography in indium-doped lithium niobate
GQ Zhang; Y Tomita; WS Xu; CH Yang
APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 77, 22, 3508-3510, Nov. 2000, We demonstrate nonvolatile two-color holography in an as-grown congruent LiNbO3:In crystal of 2.2 mm thickness. We show that the nonvolatile two-color holographic performance of the crystal is significantly improved as compared with that of other congruent LiNbO3 crystals reported so far. The figure of merit M/# and the two-color recording sensitivity S are measured to be similar to0.04 and similar to3.5x10(-4) cm/J, respectively, with a writing intensity of 4 W/cm(2) at 780 nm and a gating intensity of 1.15 W/cm(2) at 488 nm. These values are comparable to those of unreduced near-stoichiometric LiNbO3 crystals under similar recording conditions. (C) 2000 American Institute of Physics. [S0003-6951(00)04048-1].
Scientific journal, English - Apodization effect of a reflection photorefractive hologram with linear absorption
Y Tomita; R Kuze
OPTICS COMMUNICATIONS, ELSEVIER SCIENCE BV, 183, 1-4, 327-331, Sep. 2000, Peer-reviwed, New apodization mechanism of a thick reflection hologram recorded in a lossy photorefractive medium is described and analyzed numerically. The result shows that linear absorption of mutually coherent writing beams in the medium gives rise to the hologram apodization which leads to substantive sidelobe suppression in the Bragg detuning curve of the diffraction efficiency. It is also shown that the effectiveness of the hologram apodization strongly depends on the incident direction of a readout beam with respect to the gain direction of beam coupling that takes place between two writing beams. (C) 2000 Elsevier Science B.V. All rights reserved.
Scientific journal, English - Self-enhanced diffraction properties of a nominally undoped barium titanate crystal with a thermally fixed grating
Y Tomita
OPTICAL AND QUANTUM ELECTRONICS, KLUWER ACADEMIC PUBL, 32, 3, 349-365, Mar. 2000, We describe recent studies on diffraction properties of a photorefractive barium titanate crystal having a thermally fixed grating. Buildup dynamics of diffracted signals are measured to analyze the contributions of ionic and re-created photocarrier (hole) gratings to the temperature-dependent diffraction efficiency in self-enhanced readout. An activation energy of mobile ions as nonphotoactive secondary carriers for fixing volume holograms is determined holographically. This Value is compared with that of hydrogen ions estimated from polarization-dependent infrared absorption spectra in order to indentify the fixing species.
Scientific journal, English - Dual grating formation in methacrylate photopolymer films
T Kojima; Y Tomita; T Wada; S Hayakawa; R Takasaki
APPLICATIONS OF PHOTONIC TECHNOLOGY 4, SPIE-INT SOC OPTICAL ENGINEERING, 4087, 659-661, 2000, Peer-reviwed, We investigate the dynamics of holographic grating formation in methacrylate photopolymer films. Dual gratings consisting of surface relief and volume holograms are observed. The influence of such grating formation on temporal behavior of the diffracted signal is discussed.
International conference proceedings, English - New approach to determine the intensity and phase of ultrashort pulses by use of time-to-space conversion and a noniterative phase-retrieval algorithm
N Nakajima; Y Tomita
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, OPTICAL SOC AMER, 16, 6, 1268-1276, Jun. 1999, We propose a novel scheme for directly determining the intensity and phase of ultrashort pulses. The technique involves time-to-space conversion of an input pulse by a diffraction grating, followed by the detection of its spectral intensity distributions in the Fourier transform plane with and without an exponential filter placed in front of the grating. By use of an efficient noniterative phase-retrieval algorithm, the spectral phase of the pulse is retrieved from these spectral intensities. The intensity and phase of the pulse in the temporal domain can be reconstructed by the inverse Fourier transformation of the retrieved spectral amplitude. Computer simulation results confirm that robust reconstructions of a linearly chirped pulse and a pulse with quadratic and cubic spectral phases are possible with high fidelity. (C) 1999 Optical Society of America [S0740-3232(99)00406-8].
Scientific journal, English - フォトリフラクティブ効果
富田康生
日本分光学会平成11年度春季講演会シンポジウム"フォトリフラクティブ機能材料とその応用"資料, 1-8, May 1999
Scientific journal, Japanese - Photorefractive beam coupling between orthogonally polarized light beams by linear dichroism in Cu-doped potassium sodium strontium barium niobate
Y Tomita; S Matsushima
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, OPTICAL SOC AMER, 16, 1, 111-116, Jan. 1999, Two-beam coupling between orthogonally polarized waves is demonstrated by use of linear dichroism in Cu-doped potassium sodium strontium barium niobate. A maximum coupling gain coefficient of approximately 4 cm-l is obtained at a grating spacing of 1 mu m and a wavelength of 514.5 nm, where linear dichroism is moderate. The experimental results are compared with a theoretical model that allows a photorefractive grating to have an arbitrary phase shift with respect to an intensity-interference pattern. Fitting results indicate that the grating is not 90 degrees-phase-shifted under open-circuit conditions. The contribution of the bulk photovoltaic field to the photorefractive phase shift is discussed. (C) 1999 Optical Society of America [S0740-3224(99)01201-1] OCIS codes: 190.0190, 190.5330, 190.7070.
Scientific journal, English - On the nonphotoactive ionic species for thermal fixing of holograms in undoped barium titanate
Y. Tomita
Japanese Journal of Applied Physics, 38, L440-L442, 1999
Scientific journal, English - Self-enhanced diffraction properties of barium titanate with a thermally fixed grating（invited talk）
Y. Tomita
Proceedings of the 1998 International Photonic Conference,Taipei, Taiwan, 22-24, Dec. 1998
English - 強誘電体フォトリフラクティブ結晶の近赤外波長における非線形光学応答とそのホログラフィック光メモリーへの応用に関する研究
富田康生
平成9年度岩谷直治記念財団研究報告書, 21, 27-30, Aug. 1998
Japanese - Two-wave mixing and hologram recording by using linear dichroism in Cu-doped potassium sodium strontium barium niobate
Y. Tomita; S. Matsushima
Proceedings of the 1998 Topical Meeting if the International Commison for Optics（ICO）, Tianjin, China, 424-426, Aug. 1998
English - 無機フォトリフラクティブ材料とその応用
セラミックス, 33, 114-119, 1998
Scientific journal, Japanese - Physical properties and applications of photorefractive materials
Lecture Notes, International Center for Theoretical Physics, H4, SMR, 1058-1059, 1998
English - Two-wave mixing and hologram recording by using linear dichroism in Cu-doped potassium sodium strontium barium niobate
Y. Tomita; S. Matsushima
Journal of Optoelectroniss-Laser, 9, 424-426, 1998
Scientific journal, English - Faster grating buildup charactevistics in low silanol-containing polysilane-based photorefractive polymer
F. Nishida; N. Kushibiki; Y. Tomita
Applied Physics Letters, 73, 2565-2567, 1998
Scientific journal, English - Origin of temperature-dependent diffraction efficiency in self-enhanced readout from thermally fixed gratings in photorefractive barium titanate
Y Tomita; SS Matsushima
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, OPTICAL SOC AMER, 14, 11, 2877-2884, Nov. 1997, Peer-reviwed, We investigate the role of temperature-dependent ionic and re-created photocarrier (hole) gratings in self-enhanced readout from thermally fixed holographic gratings in undoped barium titanate. Initial and steady-state values of self-enhanced diffraction efficiencies were analyzed to separate ion and hole components of holographic gratings. We show that the temperature dependence of the diffraction efficiency below similar to 80 degrees C is determined mainly by the temperature-dependent behavior of the dielectric and electro-optic constants. On the other hand, it is predominantly the trend of the ionic grating that determines the temperature dependence of the diffraction efficiency above similar to 80 degrees C, even though the magnitude of the hole grating increases monotonically and is more than 10 times larger than that of the ionic grating. This finding explains the origin of the previously reported behavior of the temperature-dependent diffraction efficiency in barium titanate [Zhang et al., Appl. Opt. 34, 5241 (1995)]. An activation energy of the mobile ions was determined to be 1.05 eV, from which the shelf life of the ionic grating is estimated to be more than 150 days at 25 degrees C. (C) 1997 Optical Society of America.
Scientific journal, English - Polarization anisotropies in the electric-field-dependent diffraction efficiency in Azo dye doped photoconducting electro-optic polymer
F Nishida; Y Tomita
JOURNAL OF APPLIED PHYSICS, AMER INST PHYSICS, 81, 8, 3348-3353, Apr. 1997, Peer-reviwed, The steady-state and transient behavior of the photoconducting electro-optic polymer, PVK:TNF:DR1:ECz, was analyzed with various writing and reading beam polarization configurations to elucidate the contribution of various effects including the photoisomerization process on the diffraction phenomenon at the wavelength of 632.8 nm. The effect of the applied field on the diffraction efficiencies was observed to be strongly dependent on the polarization states of the writing and reading beams, It was found that the electro-optic contribution dominated the diffraction phenomenon for the p-polarized writing and reading beams while the molecular reorientation effect dominated for the s-polarized writing and reading beams and when the writing beams are cross polarized, The diffraction grating formed via the photoisomerization process was confirmed to be refractive index grating instead of an absorption grating. (C) 1997 American Institute of Physics.
Scientific journal, English - Picosecond space-charge field dynamics with hot electron nonlinear tramsport in semi-insulating GaAs
Proceedings of topical meeting on Photorefractive Materials, Effects and Devices, 326-329, 1997
Scientific journal, English - Effect of crystal temperature on picosecond two-beam coupling gains in undoped GaAs and Ga-doped CdTe
Proceedings of topical meeting on Photorefractive Materials, Effects, and Devices, 468-477, 1997
Scientific journal, English - Polarization dependent phenomenon in disperse red2 doped photoconducting electro-optic polymer
Proceedings of topical meeting on Photorefractive Materials, Effects, and Devices, 97-100, 1997
Scientific journal, English - Role of ionic grating in self-enhanced readout from a thermally fixed grating in a photorefractive barium titanate crystal
Proceedings of SPZE, 3137, 19-26, 1997
Scientific journal, English - 強誘電体フォトリフラクティブ結晶の近赤外波長における非線形光学応答とそのホログラフィック光メモリーへの応用に関する研究
平成8年度財団法人岩谷直治記念財団研究報告書, 20, 80-83, 1997
Japanese - Temperature-dependent picosecond two-beam coupling gains in undoped GaAs and Ga-doped CdTe
Journal of Applied Physics, 82, 5077-5081, 1997
Scientific journal, English - Effect of hot Electron nonlinear transport on picosecond space-charge field dynamics in semi-insulating GaAs
Japanese journal of Applied Physics, 36, 6360-6367, 1997
Scientific journal, English - Application of wavelet-matched filters to holographic associative memories
J Widjaja; Y Tomita; A Wahab
OPTICS COMMUNICATIONS, ELSEVIER SCIENCE BV, 132, 3-4, 217-220, Dec. 1996, We propose a novel method for improving association abilities of a holographic associative memory by using wavelet-matched filtering, Based on an edge-enhancement and multiscaling properties of the wavelet transform, a sharp correlation peak between a partial input and a stored datum can be obtained. This leads to higher association abilities. Auto- and hetero-association operations are demonstrated experimentally.
Scientific journal, English - Particle image velocimetry using wavelet-matched filters
J Widjaja; Y Tomita
JOURNAL OF MODERN OPTICS, TAYLOR & FRANCIS LTD, 43, 10, 1993-1997, Oct. 1996, A novel method for improving measurement abilities of a particle image velocimetry by using wavelet-matched filtering is proposed. Based on an edge enhancement and muitiscaling properties of a wavelet transform, an optical production of a sharp autocorrelation peak from a doubly exposed particle image is demonstrated.
Scientific journal, English - Dynamics of space-charge fields created in photorefractive barium titanate by single picosecond pulses: A computer simulation
H Ishii; Y Tomita
OPTICS COMMUNICATIONS, ELSEVIER SCIENCE BV, 126, 1-3, 95-102, May 1996, We investigate the dynamics of space-charge field formation and decay in a barium titanate crystal by single pulses of 30 ps duration at a wavelength of 532 nm, Based on the two-center electron-hole transport model, a computer simulation is performed for the dynamics on a time scale of picosecond to seconds. It is shown that the dynamics depends on a degree of the electron-hole competition which is strongly influenced by two-photon absorption. Shallow traps are found to be responsible for the dark buildup of the space-charge field. A comparison of the dynamics for single picosecond and nanosecond pulses is also made.
Scientific journal, English - 半磁性半導体のフォトリフラクティブ非線形光学効果
平成7年度矢崎科学技術振興記念財団研究成果報告書, 55-56, 1996
Japanese - Experimental investigation of the velationship between photovefuactive and teo-beam coupling response times
Optics Communications, 128, 101-105, 1996
Scientific journal, English - Light-induced divector axis veovieutation in a dye-doped fewoelective liguid cvyotal and its application to self-aligned spatial filtering
Technical Digest of the 1996 Eonfevence on Casers and Electvo-Optics (CLEO 96), 9, 476-477, 1996
Scientific journal, English - フォトリフラクティブ結晶の超短光パルス応答とその応用
富田康生
光学, 25, 396-402, 1996, Peer-reviwed
Scientific journal, Japanese - Photorefractive optical combinatorial digital logics
Technical Digest of the 1996 International Topical Meeting on Optical Computing, 1, 152-153, 1996
Scientific journal, English - Light-induced director axis reorientation in a dye-doped ferroelectric liquid crystal and its application to self-aligned spatial filtering
Techical Digest of the 1996 Conference on Lasers and Electro-Optics(CLEO96), 9, 476-477, 1996
Scientific journal, English - Holographic Associative Memory using wavelet-matched filtering
Proceedings of 17th Congress of the International Commission for Optics(ICO96), 2778, 439-440, 1996
Scientific journal, English - Gain and pump-to-probe intensity ratio dependencies of response times in photorefractive two-beam coupling
Y Tomita; SS Matsushima
17TH CONGRESS OF THE INTERNATIONAL COMMISSION FOR OPTICS: OPTICS FOR SCIENCE AND NEW TECHNOLOGY, PTS 1 AND 2, SPIE - INT SOC OPTICAL ENGINEERING, 2778, 771-772, 1996
International conference proceedings, English - 光伝導性電気光学高分子膜PVK:TNF:DR2:ECzにおける回折光の外部電場および偏光依存性
日本光学会(応用物理学会)位相共役・光波ミキシンク研究会資料, 4, 18-21, 1996
Scientific journal, Japanese - PICOSECOND CROSS-POLARIZATION BEAM COUPLING IN SEMIINSULATING GA-DOPED CDTE AT HIGH FLUENCES
Y TOMITA; E ENAMI
APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 66, 8, 914-916, Feb. 1995
Scientific journal, English - TEMPERATURE-DEPENDENCE OF PHOTOREFRACTIVE PROPERTIES OF CR-DOPED POTASSIUM-SODIUM STRONTIUM BARIUM NIOBATE
Y TOMITA
OPTICAL MATERIALS, ELSEVIER SCIENCE BV, 4, 2-3, 281-285, Jan. 1995, Photorefractive two-beam coupling gain and speed of Cr-doped potassium sodium strontium barium niobate are measured as a function of crystal temperature. It is found that the saturated coupling gain coefficient has strong temperature dependence near the ferroelectric phase transition. It is also found that the photoconductivity-dominant build-up time for the space-charge field exhibits temperature dependence. These behaviors are found quite different from the dark-conductivity dominant case and can be explained in terms of power-law dependence of a dielectric constant and a linear electrooptic coefficient on the crystal temperature.
Scientific journal, English - 無機材料中の光波の非線形相互作用 -不純物添加結晶の光誘起屈折率変化-
第16回応用物理学会スクール「非線形光学の新展開」-光波による光波の制御と時間反転波の世界-テキスト(JSAP Catalog#AP951307, 19-34, 1995
Scientific journal, Japanese - Optical wavelet-matched fiktering by four-wave mixing in photorective medin
Optics Communications, 117, 1995, 1995
Scientific journal, English - Optival triple-in digital logic using nonlinear aptical four-wave mixing
Applied Optics, 34, 5074-5076, 1995
Scientific journal, English - フォトリフラクティブ材料
富田康生
オプトロニクス, 165, 9月, 108-119, 1995
Japanese - Real-time wavelet-matched filtering using photorefractive four-wave mixing
Proceedings of SPIE, 2529, 285-289, 1995
Scientific journal, English - PHOTOREFRACTIVE PROPERTIES OF CR-DOPED STRONTIUM-BARIUM NIOBATE AT 514.5-NM AND 632.8-NM - A COMPARATIVE-STUDY
Y TOMITA; A SUZUKI
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, SPRINGER VERLAG, 59, 6, 579-582, Dec. 1994, Peer-reviwed, Two-beam coupling gain and speed of a Cr-doped strontium-barium niobate single crystal at 514.5 nm and 632.8 nm are measured to compare photorefractive origins and responses. The same single deep center and single carriers are found to be responsible for the observed photorefractivities at both wavelengths. Self-pumped phase-conjugate reflectivities are also measured at both wavelengths.
Scientific journal, English - E-MRS '94 フォトリフラクティブ材料に関する国際シンポジウム参加報告
富田康生
光学, 23, 649, Oct. 1994
Scientific journal, Japanese - Dynamics of photoexcited carriers and space-charge field by two-beam excitation in photorefracftive semiconductors
Y.Tomita; H.Ishii
Japanese Journal of Applied Physics, 33, 1892-1898, 1994
Scientific journal, English - Broadband Photorefractivity of Cr-Doped Strontium Barium Niobate in the Visible and Near-Infrared Spectral Regions
Yasuo Tomita; Akihiro Suzuki
Optical Review, 1, 2, 233-236, 1994, Peer-reviwed, Two-beam coupling gain and speed of Cr-doped strontium barium niobate in the visible and near-infrared spectral regions are measured. It is found that the sample still exhibits the appreciable photorefractive gain in the near-infrared spectrum. Photorefractive parameters such as effective trap density, effective electrooptic coefficient and mobility recombination-time product are obtained from the measurement. The photorefractive spectra of the coupling gain and speed in the sample are compared with those of Cr-doped KNSBN. © 1994, Japan Society of Applied Physics. All rights reserved.
Scientific journal, English - Broadband phoforefractivitics in Cr-doped SBN : 60 and KNSBN crystals
Y.Tomita; J. Bergquist
Technical Digest of the 1994 Topical Meeting of the Internafiond Comission for Optiss, 171, 1994, Peer-reviwed
Scientific journal, English - Temperafure dependence of photorefractive properties of Cr-doped potassium sodinm stvontium barium niobate
Y.Tomita
Proceedings of the Enropean Materials Research Society Spring Meeting Symposium on Photorefeactive Materials, 48, 281-285, 1994, Peer-reviwed
Scientific journal, English - Photorefractive propetties of doped KNSBN crystals
Y.Tomita
Proceedings of Japan-U. S. workshop on Fundional Frants in Adranced Ceramics, 122-125, 1994, Peer-reviwed
Scientific journal, English - タングステン・ブロンズ系強誘電体のフォトリフラクティブ非線形光学効果の研究
平成5年度 池谷科学技術振興財団年報, 5, 68-71, 1994
Japanese - Temperature dependence of photorefractive properties of Cr-doped potassium sodium strontium barium niobate
Proceedings of the European Materials Society Spring Meeting : Symposium on Photorefractive Materials, 48, 97-100, 1994
Scientific journal, English - Photorefractive properties of undoped, Cr-doped and Cu-doped KNSBN crystals
Y.Tomita; J.Bergquist; M.Shibata
Journal of the Optical Society of America B, 10, 94-99, 1993, Peer-reviwed
Scientific journal, English - Photorefractive and thermooptic nonlinearities in potassium sodium strontium barium niobate single crystal
Yasuo Tomita; Johan Bergquist
Optoelectronics, 8, 357-377, 1993
Scientific journal, English - Photorefractive response to ultrashort optical pulses and its applications
富田康生
日本光学会(応用物理学会)位相共役・光波ミキシンク研究会資料, 1, 12-14, 1993
Scientific journal, English - Photorefractive materials
財団法人光産業技術振興協会 光技術応用システムのフィージビリティ調査報告書, 69-76, 1993
English - Pulsewidth Dependence of Time-resolved Two-photon Absorption with Picosecond Pump-probe Excitation
Y.Tomita; M.Shibata; J.Bergquist
Journal of Applied Physics, 71, 5, 1992, Peer-reviwed
Scientific journal, English - Effects of Free-carrier Absorption on Time-resolved Pump-probe Two-photon Absorption in Semi-jnsulating Semiconductors
Y.Tomita; M.Shibata; J.Bergquist
Journal of Applied Physics, 72, 3, 1992, Peer-reviwed
Scientific journal, English - Near-infrared Photorefractivity in Cr-doped Potassium Sodium Strontium Barium Niobate Single Crystal
J.Bergquist; Y.Tomita
Applied Physics A, 55, 1992, Peer-reviwed
Scientific journal, English - Time-resolved nonlinear absorption with picosecond two-beam excitation in semi-insulating semiconductors
M.Shibata; Y.Tomita; J.Bergquist
光学, 21(9), 620-628, 1992, Peer-reviwed
Scientific journal, English - Photorefractive nonlinear optics and its applications
Y.Tomita
応用物理, 59(9), 1154-1174, 1990, Peer-reviwed
Scientific journal, English - Polarization and Spatial Information Recovery by Model Dispersal and Phase Conjugation : Rroperties and Applications
Y.Tomita; R.Yahalom; A.Yariv; K.Kyma; S-K.Kwong
IEEE Journal of Quantum Electronics, 25, 3, 1989, Peer-reviwed
Scientific journal, English - Phase Shift and Cross Talk of a Self-pumped Phase-Conjugate mirror
Y.Tomita; R.Yahalom; A.Yariv
Optics Communications, 73, 5, 1989, Peer-reviwed
Scientific journal, English - Theory of Polarization and Spatial Information Recovery by Modal Dispersal and Phase Conjugation
Y.Tomita; R.Yahalom; A.Yariv
Journal of the Optical Society of America B, 5, 3, 1988, Peer-reviwed
Scientific journal, English - Real-time lmage Subtraction with the Use of Ware Polarization and Phase Conjugation
Y.Tomita; R.Yahalom; A.Yariv
Applied Physics Letters, 52, 6, 1988, Peer-reviwed
Scientific journal, English - Optical Tracking Filter Using Transient Energy Coupling
S.-K.Kwong; Y.Tomita; A.Yariv
Journal of the Optical Society of America B, 5, 8, 1988, Peer-reviwed
Scientific journal, English - Phase shift of a self-pumped phase-conjugate mirror
Y.Tomita; R.Yahalom; A.Yariv
Technical Digest of the 1988 Annual Meeting of the Optical Society of America, 161, 1988, Peer-reviwed
Scientific journal, English - FIDELITY OF POLARIZATION AND SPATIAL INFORMATION RECOVERY USING A FIBER-COUPLED PHASE-CONJUGATE MIRROR
Y TOMITA; R YAHALOM; A YARIV
OPTICS LETTERS, OPTICAL SOC AMER, 12, 12, 1017-1019, Dec. 1987, Peer-reviwed
Scientific journal, English - Demonstration of Amplitude-distortion Correction by Model Dispersal and Phase Conjugation
Y.Tomita; K.Kyuma; R.Yahalom; A.Yariv
Optics Letters, 12, 12, 1987, Peer-reviwed
Scientific journal, English - Effect of Model Dispersal on the Polarization and Apatial Recouery in a Fiber-Coupled Phave Conjugate Mivror
Y.Tomita; R.Yahalom; A.Yariv
Potdeadline papers of the 1987 Conference on Casers and Electro-Optics (CLEO 87), 237-238, 1987, Peer-reviwed
Scientific journal, English - THEORETICAL-MODEL FOR MODAL DISPERSAL OF POLARIZATION INFORMATION AND ITS RECOVERY BY PHASE CONJUGATION
A YARIV; Y TOMITA; K KYUMA
OPTICS LETTERS, OPTICAL SOC AMER, 11, 12, 809-811, Dec. 1986, Peer-reviwed
Scientific journal, English - 複合膜構造による磁気光学効果のエンハンスメント
富田康生
昭和60年電気学会全国大会講演論文集[3], 9-12, 1985, Peer-reviwed
Scientific journal, Japanese - Optimum Design of Multilayer-medium Structures in a Magnet-optical Readout System
Y.Tomita; T.Yoshino
Journal of the Optical Society of America A, 1, 8, 1984, Peer-reviwed
Scientific journal, English - 光磁気読み取り系での最適多層膜構成
富田康生
第5回電気学会光磁気ディスク研究会資料, 1-6, 1984, Peer-reviwed
Scientific journal, Japanese - FIBROUS RADIAL STRUCTURE OF SPECKLE PATTERNS IN POLYCHROMATIC-LIGHT
Y TOMITA; K NAKAGAWA; T ASAKURA
APPLIED OPTICS, OPTICAL SOC AMER, 19, 18, 3211-3218, 1980, Peer-reviwed
Scientific journal, English - CONTRAST OF POLYCHROMATIC SPECKLE PATTERNS WITH NON-GAUSSIAN STATISTICS
Y TOMITA; K NAKAGAWA; T ASAKURA
OPTIK, WISSENSCHAFTLICHE VERLAG MBH, 57, 2, 209-216, 1980, Peer-reviwed
Scientific journal, English - THE CONTRAST VARIATION OF POLYCHROMATIC SPECKLE PATTERNS AT THE FAR-FIELD DIFFRACTION PLANE
Y TOMITA; K NAKAGAWA; T ASAKURA
CANADIAN JOURNAL OF PHYSICS, NATL RESEARCH COUNCIL CANADA, 58, 10, 1439-1445, 1980, Peer-reviwed
Scientific journal, English - An elongated structure of speckle patterns in polychromatic laser light
K.Nakagawa; Y.Tomita; T.Asakura
AIP Conterence Proceedings, Optics in Four-Dimensions-1980 (ICO,Ensenada), 65, 708-713, 1980, Peer-reviwed
Scientific journal, English
MISC
- Slow-neutron mirrors from holographic nanoparticle - polymer composites
J. Klepp; M. Fally; P. Geltenbort; C. Pruner; Y. Tomita
Laue-Langevin Institute, 01 Apr. 2014, Laue-Langevin Institute Annual report 2013, 86-87, English, Technical report - ナノ微粒子分布のホログラフィック操作による体積ホログラフィック記録
富田康生
Dec. 2005, 光技術コンタクト, 43, 12, 1-12, Japanese, Introduction other - HUMAN INTERVIEW 仏作って魂入れず
富田康生
Mar. 2005, オプトロニクス, 279, 99-103, Japanese, Others - フォトリフラクティブ効果に関する国際シンポジウムに参加して
富田康生
May 1998, スズキ財団ニュース, 18, 24-26, Japanese, Introduction other - 無機フォトリフラクティブ材料とその応用
富田康生
1998, セラミックス, 33, 114-119, Japanese, Introduction other - 大学教育におけるチェック・アンド・バランス
富田康生
Aug. 1996, 岩谷直治記念財団機関誌 NEEDS, 22, 16, Japanese, Others - フォトリフラクティブ結晶の超短光パルス応答とその応用
富田康生
1996, 光学, 25, 396-402, Japanese, Peer-reviwed, Introduction other - フォトリフラクティブ材料
富田康生
1995, オプトロニクス, 165, 108-119, Japanese, Introduction other - E-MRS '94 フォトリフラクティブ材料に関する国際シンポジウム参加報告
富田康生
Oct. 1994, 光学, 23, 649, Japanese, Introduction other - Photorefractive nonlinear optics and its applications
Y.Tomita
1990, 応用物理, 59(9), 1154-1174, English, Peer-reviwed, Introduction other
Books and other publications
- Encyclopedia of Nanoscience and Nanotechnology, Volume 15
Yasuo Tomita
English, Joint work, Holographic nanoparticle-photopolymer composites, American Scientific Publishers, Apr. 2011 - ホログラム最新技術～感光材料開発から実製品への応用まで～
Yasuo Tomita
Japanese, Joint work, 体積ホログラフィック光記録のためのナノコンポジットフォトポリマー材料, 情報機構, Dec. 2006 - デンドリティック高分子
富田康生
Japanese, Joint work, 光記録材料, エヌ・ティー・エス, Nov. 2005 - 光技術総合事典（分担執筆）
富田康生
Japanese, Joint work, オプロトニクス, Dec. 2004 - 最新回折光学素子 技術全集
富田康生
Japanese, Joint work, ナノ微粒子分散フォトポリマーを用いた高効率ホログラフィック回折格子, 技術情報協会, Dec. 2004 - 第３章ディスプレイに関する光の発生と制御の基礎 第3.1.1～1.1.4節、「情報ディスプレイハンドブック」
富田康生
Japanese, Joint work, 培風館, Jul. 2001 - 光材料研究者データベース
富田康生
Japanese, Joint work, タングステン・ブロンズ系強誘電体フォトリフラクティブ材料の研究, 光産業技術振興協会, Mar. 1999 - 光サイエンス辞典（分担執筆）
富田康生
Japanese, Joint work, オプトロニクス社, Dec. 1998 - 応用物理用語大事典（分担執筆）
富田康生
Japanese, Joint work, オーム社, Apr. 1998 - 光波エレクトロニクス
富田康生
Japanese, Editor, 培風館, 1997 - 光コンピューティング事典（分担執筆）
富田康生
Japanese, Joint work, 光位相共役の応用, オプトロニクス, 1997 - 強誘電体/高誘電体デバイス・部品とアプリケーション
富田康生
Japanese, Joint work, 強誘電体フォトリフラクティブ結晶を用いたホログラフィック光メモリ, ミマツデータシステム, 1996 - オプトエレクトロニクス用語事典（分担執筆）
富田康生
Japanese, Joint work, オーム社, 1996 - フォトリフラクティブ非線形光学（邦訳）
富田康生; 北山研一
Japanese, 丸善, 1995
Lectures, oral presentations, etc.
- 体積ホログラフィック記録のための光重合性有機ナノ微粒子-ポリマーコンポジットの高効率赤色波長域増感について
成田麻子; 大島寿朗; 富田康生
Oral presentation, Japanese, 第81回応用物理学会秋季学術講演会, 応用物理学会, オンライン開催, Domestic conference
08 Sep. 2020 - 光重合性ポリマーナノコンポジット材料の情報フォトニクス、非線形光学、中性子光学への応用
富田康生
Invited oral presentation, Japanese, 高分子学会第14回フォトニクスポリマー研究会講座, Invited, 高分子学会フォトニクスポリマー研究会, 横浜, Domestic conference
17 Mar. 2020 - 赤色波長域での光重合性有 機ナノ微粒子-ポリマーコンポジットフィルムの体積ホログラフィック記録特性
富田康生; 成田麻子; 長谷川脩真; 大島寿朗; 大土井啓祐
Oral presentation, Japanese, 第67回応用物理学会春季学術講演会, 応用物理学会, 東京, Domestic conference
15 Mar. 2020 - ナノ微粒子-ポリマーコンポジット格子の屈折率変調振幅増大化への可塑剤添加効果
佐藤謙太; 富田康生
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2019, 日本光学会, 大阪, Domestic conference
02 Dec. 2019 - ナノコンポジットホログラフィック格子からの光波および中性子物質波のブラッグ散乱とその応用
富田康生
Invited oral presentation, Japanese, 2019年度 第3回光材料・応用技術研究会, Invited, 一般財団法人光産業技術振興協会, 静岡県、三島市、東レ総合研修センター, Domestic conference
07 Nov. 2019 - ナノコンポジットホログラフィック格子からの光波および中性子物質波のブラッグ散乱とその応用
富田康生
Invited oral presentation, Japanese, 2019年度 第3回光材料・応用技術研究会, Invited, 一般財団法人光産業技術振興協会, 静岡県、三島市、東レ総合研修センター, Domestic conference
07 Nov. 2019 - 低速中性子ビームホログラフィック制御のためのナノダイヤモンド分散コンポジット格子
影山明久; 富田康生; 梅本浩一; 劉明; Jürgen Klepp; Christian Pruner; Martin Fally
Oral presentation, Japanese, 第80回応用物理学会秋季学術講演会, 応用物理学会, 札幌, Domestic conference
19 Sep. 2019 - 超常磁性Fe3O4ナノ微粒子-ポリマーコンポジット格子からの低速中性子ビーム回折の観測
富田康生; 磯由布子; 影山明久; ürgen Klepp; Christian Pruner,Martin Fally
Oral presentation, Japanese, 第80回応用物理学会秋季学術講演会, 応用物理学会, 札幌, Domestic conference
19 Sep. 2019 - Yet another approach to tackle the phase problem of diffraction experimentally
M. Fally; J. Klepp; J. Kohlbrecher; J. Guo; Y. Tomita
Invited oral presentation, English, 2019 Joint Annual Meeting of the Swiss Physical Society and the Austrian Physical Society, Invited, Austrian Physical Society, Swiss Physical Society, Zurich, International conference
29 Aug. 2019 - Nonlinear optical properties of a new inorganic-organic nanocomposite material highly dispersed with semiconductor CdSe quantum dots
Yasuo Tomita
Keynote oral presentation, English, IV International Conference on Applications of Optics and Photonics (AOP 2019), Invited, Portuguese Society for Optics and Photonics (SPOF), SPIE, ICO, Lisbon, Portugal, International conference
01 Jun. 2019 - Hyperbranched-polymer nanocomposite gratings with ultrahigh refractive index modulation amplitudes for volume holographic optical elements
Y. Tomita; T. Aoi; J. Oshima; K. Odoi
Invited oral presentation, English, SPIE Optics + Optoelectronics 2019, Invited, SPIE, Prague, International conference
01 Apr. 2019 - ナノダイヤモンド分散コンポジットホログラフィック格子
影山明久; 富田康生; 梅本浩一; ürgen Klepp; Christian Pruner; Martin Fally
Oral presentation, Japanese, 第６６回応用物理学会春季学術講演, 応用物理学会, 東京, Domestic conference
10 Mar. 2019 - Volume holographic nanocomposite gratings with very large refractive index modulation amplitudes
Y. Tomita; T. Aoi; Y. Iso; K. Satoh; J. Oshima; K. Odoi
Invited oral presentation, English, International Workshop on Holography and Related Technologies (IWH) 2018, Invited, Optical Society of Japan, International Workshop on Holography, Soochow University, Tsinghua University, CORE Utsunomiya University, Suzhou, China, International conference
01 Dec. 2018 - 無機ナノ微粒子-ポリマーコンポジット格子の屈折率変調振幅の増大化
佐藤謙太; 磯由布子; 富田康生
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2018, 日本光学会, 東京, Domestic conference
01 Nov. 2018 - 体積ホログラフィック光学素子のための超高屈折率変調振幅を有する有機ナノ微粒子-ポリマーコンポジット格子
富田康生; 青井紀; 大島寿朗; 大土井啓祐
Oral presentation, Japanese, 第７９回応用物理学秋季学術講演会, 応用物理学会, 名古屋, Domestic conference
20 Sep. 2018 - 超常磁性ナノ微粒子-ポリマーコンポジット格子
富田康生; 影山明久; 磯由布子; 青井紀; Jürgen Klepp; Christian Pruner; Martin Fally
Oral presentation, Japanese, 第６５回応用物理学会春季学術講演会, 応用物理学会, 東京, Domestic conference
17 Mar. 2018 - Photopolymerizable nanocomposite materials for holographic applications
Y. Tomita
Invited oral presentation, English, III International Symposium on Nanoparticles/Nanomaterials Applications (ISN2A 2018 ), Invited, FACULDADE DE CIENCIAS E TECHNOLOGIA (UNIVERSIDADE NOVA DE LISBOA), UCIBIO, BIOSCOPE, PROTEOMASS, CAPRICA CIENTIFICA, Caprica, Lisbon, Portugal, International conference
24 Jan. 2018 - Photopolymerizable nanocomposite materials for light and quantum beam control and processing
Y. Tomita
Invited oral presentation, English, EMN Orlando Meeting 2017, Invited, OAHOST, UESTC, MATECSS, INRS, SPringer, Orlando, USA, International conference
06 Dec. 2017 - Nanocomposite holographic gratings for light and neutron optics
Y. Tomita; E. Hata; T. Nakamura; K. Momose; X. Liu; S. Matsushima; J. Klepp; C. Pruner; M. Fally
Keynote oral presentation, English, The 12th Japan-Finland Joint Symposium on Optics in Engineering (OIE'17), Invited, The Optical Society of Japan, Sado, Japan, International conference
12 Sep. 2017 - ナノダイヤモンドホログラム
富田康生; 梅本浩一; 吉永和夫; 藪田湖納美; 青井紀; Jürgen Klepp; Christian Pruner; Martin Fally
Oral presentation, Japanese, 第７８回応用物理学秋季学術講演会, 応用物理学会, 福岡, Domestic conference
08 Sep. 2017 - 可飽和吸収と高次非線形屈折を有する非線形ナノコンポジッ ト媒質のためのclosed-aperture Z-scan理論
松島俊輔; 富田康生
Oral presentation, Japanese, 第７８回応用物理学秋季学術講演会, 応用物理学会, 福岡, Domestic conference
06 Sep. 2017 - Perspectives for photorefractive materials in neutron physics
R. A. Rupp; M. Fally; J. Klepp; C. Pruner; Y. Tomita; I. D. Olenik
Invited oral presentation, English, Photorefractive Photonics 2017, Invited, Nankai Univ., Qingdao Univ., National Natural Science Foundation of China, Qingdao Society of Physics, Qingdao, China, International conference
20 Jul. 2017 - High-order optical nonlinearities in nanocomposite films dispersed with semiconductor quantum dots at high concentrations
Y. Tomita; S. Matsushima; R. Yamagami; T. Jinzenji; S. Sakuma; X. Liu; T. Izuishi; Q. Shen
Invited oral presentation, English, Photorefractive Photonics 2017, Invited, Nankai Univ., Qingdao Univ., National Natural Science Foundation of China, Qingdao Society of Physics, Qingdao, China, International conference
18 Jul. 2017 - Nanocomposite volume holographic gratings incorporated with ultrahigh refractive index hyperbranched polymer for diffractive optical elements
Y. Tomita; S. Oyaizu; N. Nishimura; K. Odoi
Invited oral presentation, English, SPIE Optics + Optoelectronics 2017, Invited, SPIE, Prague, Czech, International conference
25 Apr. 2017 - Statistical thermodynamic analysis of the grating formation in a holographic polymer-dispersed liquid crystal
Y. Tomita
Public discourse, English, Vienna University, Invited, Prof. M. Fally, Faculty of Physics, Vienna University, Vienna, Astria, International conference
21 Apr. 2017 - 光波と量子ビーム制御・処理のための光重合性ナノコンポジット材料
富田康生
Invited oral presentation, Japanese, 第６４回応用物理学会春季学術講演会, Invited, 応用物理学会, 横浜, Domestic conference
16 Mar. 2017 - 光重合性ナノコンポジット材料を用いたホログラフィックデジタルデータ記録
富田康生
Invited oral presentation, Japanese, 電子情報通信学会 磁気記録・情報ストレージ研究会, Invited, 電子情報通信学会, 愛媛大学, Domestic conference
08 Dec. 2016 - Photopolymerizable nanocomposite materials for light and neutron optics
Y. Tomita; E. Hata; K. Momose; X. Liu; J. Klepp; C. Pruner; M. Fally
Keynote oral presentation, English, 1st International conference on Optics, Photonics and Materials (NICE OPTICS 2016), Invited, European Optical Society (EOS), Materials Research Society (MRS), Nice, France, International conference
28 Oct. 2016 - Control and processing of electromagnetic and quantum waves with nanostructured composite gratings
Y. Tomita
Public discourse, English, Beijing University of Technology, Invited, Prof. Xinping Zhang, Beijing, China, International conference
16 Oct. 2016 - Observation of multi-wavelength neutron Pendullösung interference in holographic nanostructures
J. Klepp; C. Pruner; Y. Tomita; P. Geltenbort; M. Fally
Invited oral presentation, English, 66th yearly meeting of the Austrian Physical Society (OEPG16), Invited, Austrian Physical Society, Vienna, Austria, International conference
28 Sep. 2016 - ナノ微粒子-ポリマーコンポジットに記録されたデジタルデータページ再生忠実度のホログラム記録温度依存性
富田康生; 長屋航汰
Oral presentation, Japanese, 第７７回応用物理学秋季学術講演会, 応用物理学会, 新潟, Domestic conference
15 Sep. 2016 - 超高屈折率ハイパーブランチポリマーを用いたナノ微粒子-ポリマーコンポジットの体積ホログラフィック記録感度の改善
武内慎介; 小柳津聡子; 富田康生; 西村直也; 大土井啓祐
Oral presentation, Japanese, 第７７回応用物理学秋季学術講演会, 応用物理学会, 新潟, Domestic conference
15 Sep. 2016 - Diffractive optics for slow neutrons
M. Fally; J. Klepp; C. Pruner; P. Geltenbort; G. Nagy; L. Coga; M. Licen; I. Drevensek-Olenik; Y. Tomita
Invited oral presentation, English, 2016 Meeting of Austrian Neutron and Synchrotron Users (NESY), Invited, Austrian Neutron and Synchrotron User (NESY), Graz, Austria, International conference
15 Sep. 2016 - Effects of liquid crystal droplets on the spatial frequency response of a holographic polymer-dispersed liquid crystal grating
Yasuo Tomita
Invited oral presentation, English, EMN Meeting Droplets 2016, Invited, OA Host, UESTC, MATECSS, INRS, Springer, San Sebastian, Spain, International conference
12 May 2016 - カチオン開環重合モノマーを用いたナノ微粒子-ポリマーコンポジットの体積ホログラフィック記録特性
小野孝典; 富田康生
Oral presentation, Japanese, 第６３回応用物理学春季学術講演会, 応用物理学会, 東京, Domestic conference
21 Mar. 2016 - フッ素含有ハイパーブランチポリマーを用いたナノ微粒子-ポリマーコンポジットの体積ホログラフィック記録特性
武内慎介; 富田康生; 西村直也; 大土井啓祐
Oral presentation, Japanese, 第６３回応用物理学春季学術講演会, 応用物理学会, 東京, Domestic conference
21 Mar. 2016 - Holographic control of nanoparticle-distribution morphology in polymer and its applications
Yasuo Tomita
Invited oral presentation, English, ICSS Meeting 2015, Invited, OAHOST, Phuket, Thailand, International conference
04 Nov. 2015 - 青色波長増感ナノ微粒子-(チオール・エン)ポリマーコンポジットの体積ホログラフィック記録
高橋潤一郎; 富田康生
Poster presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2015, 日本光学会, 筑波大学東京キャンパス文京校舎、東京, Domestic conference
30 Oct. 2015 - Observation of the cascaded fifth-order optical nonlinearity in nanostructured polymer nanocomposites dispersed with semiconductor CdSe quantum dots
Yasuo Tomita
Public discourse, English, invited lecture, Invited, Nankai University, Photonics Center, Nankai University, Tianjin, China, International conference
29 Sep. 2015 - High-order nonlinear optical responses of nanostructured polymer composites doped with semiconductor CdSe quantum dots at high concentration
Yasuo Tomita
Invited oral presentation, English, The Eleventh Japan-Finland Joint Symposium on Optics in Engineering (OIE'15), Invited, University of Eastern Finland, Joensuu, Finland, International conference
02 Sep. 2015 - Photopolymerizable polymer nanocomposite materials for photonic applications
Yasuo Tomita
Invited oral presentation, English, 2015 EMN Optoelectronics Meeting, Invited, OQ HOST, Beijing, China, http://www.emnmeeting.org/optoelectronics/, International conference
25 Apr. 2015 - 0.02以上の屈折率変調を有する有機ナノ微粒子-ポリマーコンポジット体積ホログラフィック格子
富田康生; 浦野寛史; 西村直也; 大土井啓祐
Oral presentation, Japanese, 第６２回応用物理学春季学術講演会, 応用物理学会, 東海大学湘南キャンパス、神奈川, Domestic conference
12 Mar. 2015 - 高濃度半導体CdSe量子ドット分散ポリマーナノコンポジット中における高屈折率変調Bragg格子の形成
山上龍一; 秦泉寺貴章; 富田康生
Oral presentation, Japanese, 第６２回応用物理学春季学術講演会, 応用物理学会, 東海大学湘南キャンパス、神奈川, Domestic conference
12 Mar. 2015 - 高濃度CdSe量子ドット分散ポリマーナノコンポジットの非線形光学特性
山上龍一; 富田康生
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2014, 日本光学会, 東京, Domestic conference
07 Nov. 2014 - 青色感度を有するナノ微粒子-(チオール-エン)ポリマーコンポジットを用いた体積ホログラフィック記録：チオール・エン組成依存性
高橋潤一郎; 川名優; 安井理; 富田康生
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2014, 日本光学会, 東京, Domestic conference
07 Nov. 2014 - 可逆的付加開裂連鎖移動光重合に基づくナノ微粒子-ポリマーコンポジットの体積ホログラフィック記録特性
小野孝典; 富田康生
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2014, 日本光学会, 東京, Domestic conference
07 Nov. 2014 - Holographic recording and beam control with organic-inorganic nanocomposites
Yasuo Tomita
Oral presentation, English, International Workshop on Holography and Related Technologies (IWH2014), Invited, International workshop on holography, Beijing Institute of Technology, Tsinghua University, Holography system development forum, Beijing, China, International conference
15 Oct. 2014 - 逐次重合反応を用いたナノ微粒子-ポリマーコンポジットを用いたホログラフィックデジタルデータページシフト多重記録
長屋航太; 高山新吾; 富田康生
Oral presentation, Japanese, 電子情報通信学会電子部品・材料研究会/信学技報, Invited, 電子情報通信学会電子部品・材料研究会, 東京, Domestic conference
08 Oct. 2014 - Neutron physics in photorefractive materials: From researches to applications
R.A. Rupp; M. Fally; J. Klepp; C. Pruner; Y. Tomita; I. Drevensek
Keynote oral presentation, English, International scientific conference “Optics of Crystals” (OC-14), Invited, Ministry of Education of Belarus, The Optical Society of America (OSA) and Belarusian Republican Foundation for Fundamental Research, Mozyr, Belarus, International conference
23 Sep. 2014 - Thermal stability of ZrO2 nanoparticle-polymer composite volume gratings incorporating multifunctional chain transfer agents
Jinxin Guo; Ryuta Fujii; Takanori Ono; Yasuo Tomita
Oral presentation, English, JSAP-OSA Joint Symposia 2014, Domestic conference
18 Sep. 2014 - Characterization and application of holographically structured nanoparticle-polymer composite gratings
Yasuo Tomita
Invited oral presentation, English, invited lecture, Invited, Department of Physics, Systems Engineering and Signal Theory, University of Alicante, Alicante, Spain, International conference
05 Sep. 2014 - Photopolymerizable organic-inorganic nanocomposite materials and their application
Yasuo Tomita
Invited oral presentation, English, ICO-23, Invited, International Commission for Optics, Santiago de Compostela, Spain, International conference
29 Aug. 2014 - Light-induced nanoparticle assembly in photopolymer for holographic application
Yasuo Tomita
Invited oral presentation, English, Collaborative Conference on 3D & Materials Research (CC3DMR) 2014, Invited, HoloDigilog Human Media Research Center, Kwangwoon Univ., Incheon/Seoul, South Korea, International conference
25 Jun. 2014 - ナノコンポジット体積ホログラムの特性とその多彩な応用
富田康生
Invited oral presentation, Japanese, 日本光学会第19回ボリュームホログラフィック技術研究グループ研究会, Invited, ボリュームホログラフィック技術研究グループ, 東京, Domestic conference
21 May 2014 - Optics with neutrons using holographic gratings
M. Fally; J. Klepp; C. Pruner; Y. Tomita
Invited oral presentation, English, DPG (German Physical Society) Spring Meeting of the Condensed Matter Section (Dresden 14), Invited, German Physical Society, Dresden, Germany, Our recent works on applications of nanoparticle-polymer composite volume gratins to neutron optics are described., International conference
31 Mar. 2014 - 光重合性ナノ微粒子-ポリマーコンポジットへの連鎖移動剤添加による体積ホログラムの屈折率変調増大化と空間周波数応答特性の改善
藤井隆太; Jinxin Guo; 富田康生
Oral presentation, Japanese, 第６１回応用物理学春季学術講演会, 応用物理学会, 神奈川, 光重合性ナノ微粒子-ポリマーコンポジットへの連鎖移動剤添加による体積ホログラムの屈折率変調増大化と空間周波数応答特性の改善を同時に実現した。, Domestic conference
19 Mar. 2014 - Performance of nanoparticle-(meth)acrylate polymer composites modified by chain-transferring thiols with varying structures
Jinxin Guo; Ryuta Fujii; Yasuo Tomita
Oral presentation, English, 日本光学会,日本光学会年次学術講演会 Optics&Photonics Japan 2013
13 Nov. 2013 - チオール・イン反応に基づく光重合性ナノ微粒子-ポリマーコンポジットを用いたホログラフィックデジタルデータ記録
長屋航太; 高山新吾; 三部兼; 富田康生
Oral presentation, Japanese, 日本光学会,日本光学会年次学術講演会 Optics&Photonics Japan 2013
13 Nov. 2013 - Significance of chain transfer agents in holographic photopolymers
Jinxin Guo; John T. Sheridan; Yasuo Tomita
Oral presentation, English, JSAP-OSA Joint Symposia 2013
17 Sep. 2013 - Photopolymerizable nanocomposite materials and their applications
Yasuo Tomita
Invited oral presentation, English, The 11th International Conference “Correlation Optics" (CO’13), SPIE, Chernivtsi, Ukraine, International conference
Sep. 2013 - A new holographic recording material with high refractive index modulation and high mechanical/thermal stability: Photopolymerizable nanoparticle-polymer composite
Yasuo Tomita
Invited oral presentation, English, International Symposium on Optical Memory 2013 (ISOM’13), JSAP, MSJ, OITDA, HLDS, CISD, Incheon, South Korea, International conference
Aug. 2013 - Photopolymerizable nanocomposite materials for photonic applications
Yasuo Tomita
Invited oral presentation, English, Collaborative Conference on 3D & Materials Research (CC3DMR) 2013, HoloDigilog Human Media Research Center of Kwangwoon University and National Research Foundation of Korea, Jeju, South Korea, International conference
Jun. 2013 - Nonlinear optical wave mixing in photopolymerizable nanocomposites dispersed with semiconductor CdSe quantum dots
Yasuo Tomita
Invited oral presentation, English, invited lecture, Faculty of Physics, Vienna University, Vienna, Austria, International conference
Apr. 2013 - 連鎖移動剤を添加した光重合性ナノ微粒子-ポリマーコンポジットの体積ホログラフィック記録特性
藤井隆太; 三部兼; 富田康生
Oral presentation, Japanese, 応用物理学会,第６０回応用物理学春季学術講演会
Mar. 2013 - 高屈折率ハイパーブランチポリマーナノ微粒子を分散した光重合性ナノコンポジットフォトポリマーフィルムの体積ホログラフィック記録特性
亀谷康宏; 西村裕輝; 富田康生; 西村直也; 大土井啓祐
Oral presentation, Japanese, 応用物理学会,第６０回応用物理学春季学術講演会
Mar. 2013 - 冷中性子ビーム用ホログラフィック中性子光学ミラーのためのナノ微粒子―ポリマーコンポジット自立膜
富田康生; 三部兼; rgen Klepp; Christian Pruner; Peter Galtenport; Martin Fally
Oral presentation, Japanese, 応用物理学会,第６０回応用物理学春季学術講演会
Mar. 2013 - 光重合性ナノ微粒子ーポリマーコンポジット
富田康生
Invited oral presentation, Japanese, 2013年第１回ホログラフィック・ディスプレィ (HODIC) 研究会, ホログラフィック・ディスプレィ (HODIC) 研究会
Mar. 2013 - 光重合性ナノ微粒子-ポリマーコンポジットを用いたホログラフィック光記録:連鎖移動剤添加による記録特性の向上
藤井隆太; 三部兼; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学合同シンポジウム「ナノ未来材料とコヒーレント光科学」第9回公開シンポジウム, 東京農工大学・電気通信大学, 東京
Dec. 2012 - ホログラフィック高分子分散液晶中のホログラフィック格子形成過程の統計熱力学シミュレーション解析―光重合動特性の格子モフォロジーへの影響―
福田吉晃; 富田康生
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2012
Oct. 2012 - 青紫色波長域における光重合性ナノ微粒子―（チオール・エン）ポリマーコンポジットの光重合特性と体積ホログラフィック記録特性の開始剤濃依存性
川名優; 富田康生
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2012
Oct. 2012 - チオール-イン重合に基づく光重合性ナノ微粒子-ポリマーコンポジットの緑色波長域における体積ホログラフィック記録特性
三部兼; 西村裕輝; 高山新吾; 長屋航太; 富田康生
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2012
Oct. 2012 - ホログラフィック応用のためのナノ微粒子-（チオール・イン）ポリマーコンポジットの光重合動特性
西村裕輝; 三部兼; 富田康生
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2012
Oct. 2012 - 光重合性ナノ微粒子-（チオール・エン）ポリマーコンポジットを用いたデジタルデータページのホログラムシフト多重記録特性―再生画像品質の変調コーディングフォーマット依存性―
高山新吾; 長屋航太; 富田康生
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2012
Oct. 2012 - 光重合性半導体CdSe量子ドットーポリマーコンポジット中の縮退多光波混合
安達佑亮; Xiangming Liu; 富田康生; 大島寿朗; 中嶋琢也; 河合壯
Oral presentation, Japanese, 第７３回応用物理学会学術講演会講演予稿集,第７３回応用物理学会学術講演会
Sep. 2012 - Photopolymerizable nanoparticle-polymer nanocomposites for holographic digital data storage
Yasuo Tomita
Invited oral presentation, English, invited lecture, Photonics Center, Nankai University, Tianjin, China, International conference
Aug. 2012 - Third- and fifth-order nonlinear optical responses of semiconductor quantum dots-polymer nanocomposites capable of holographically patterning photonic lattice structures
Yasuo Tomita
Invited oral presentation, English, invited lecture, Photonics Center, Nankai University, Tianjin, China, International conference
Aug. 2012 - ナノコンポジットマテリアルの光学と応用
富田康生
Invited oral presentation, Japanese, 2012年 第37回光学シンポジウム, 応用物理学会 分科会 日本光学会
Jun. 2012 - 光重合性ナノ微粒子―（チオール・イン）ポリマーコンポジットを用いた体積ホログラフィック記録
三部兼; 西村裕輝; 富田康生
Oral presentation, Japanese, 応用物理学会,第5９回応用物理学関係連合講演会
Mar. 2012 - 密度汎関数理論に基づくホログラフィック高分子分散液晶中のホログラフィック格子形成過程の統計熱力学解析
福田吉晃; 富田康生
Oral presentation, Japanese, 応用物理学会,第5９回応用物理学関係連合講演会
Mar. 2012 - ナノ微粒子―ポリマーコンポジット中のホログラム記録過程へのCaputo現象論モデル適用の妥当性について
Agyl F. Rizky; 富田康生
Oral presentation, Japanese, 応用物理学会,第5９回応用物理学関係連合講演会
Mar. 2012 - ナノ微粒子―（チオール・エン）ポリマーコンポジットを用いたデジタルデータページのホログラムシフト多重記録特性
高山新吾; 百瀬啓祐; 富田康生
Oral presentation, Japanese, 応用物理学会,第5９回応用物理学関係連合講演会
Mar. 2012 - Slow-light in photonic crystal waveguides/fiber: dispersion tailoring schemes for obtaining a high group index with wide band and low GVD
L. Ren; J. Liang; M. Yun; C. Ma; X. Han; Y. Liu; Y. Tomita
Invited oral presentation, English, Photonics West 2012, SPIE, San Franscisco, USA, International conference
Jan. 2012 - 光重合性ナノコンポジットポリマーを用いた非線形光学と中性子光学
富田康生
Invited oral presentation, Japanese, レーザー学会第３２回年次大会, レーザー学会
Jan. 2012 - ナノ微粒子-ポリマーコンポジットフィルムに記録したBragg格子の空間解像度
Agyl F. Rizky; 富田康生
Public symposium, Japanese, 「ナノ未来材料とコヒーレント光科学」第8回公開シンポジウム, 東京農工大学・電気通信大学, 東京
Dec. 2011 - Observation of higher-order optical nonlinearities in a photopolymerizable nanocomposite film dispersed with semiconductor CdSe quantum dots
Xiangming Liu; Yasuo Tomita; Yusuke Adachi; Juro Oshima; Takuya Nakashima; Tsuyoshi Kawai
Oral presentation, English, 日本光学会,Optics&Photonics Japan 2011
Nov. 2011 - ナノ微粒子-(チオール・エン)ポリマーコンポジットを用いたホログラフィックデータページ記録
百瀬啓祐; 高山新吾; 富田康生
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2011
Nov. 2011 - Polymer nanocomposite diffraction gratings for neutrons
M. Fally; J. Klepp; C. Pruner; Y. Tomita; S. Gyergyek; I. Drevensek-Olenik; J. Kohlbrecher; P. Geltenbort
Invited oral presentation, English, SLONANO 2011, Jožef Stefan Institute, National Institute of Chemistry, CENN Nanocenter, CE Polimat and University of Nova Gorica School of Applied Science, Ljubljana, Slovenia, International conference
Oct. 2011 - 熱統計力学モデルに基づくホログラフィック高分子分散液晶中のホログラフィック格子形成過程のモンテカルロシミュレーション
福田吉晃; 大平隆一郎; 富田康生
Oral presentation, Japanese, 応用物理学会,第７２回応用物理学会学術講演会
Aug. 2011 - 青紫色波長域におけるチオール・エンモノマーを用いたナノ微粒子―ポリマーコンポジットの光重合特性
安井理; 西村裕輝; 富田康生
Oral presentation, Japanese, 応用物理学会,第７２回応用物理学会学術講演会
Aug. 2011 - Z-scan study of optical nonlinearities in photopolymerizable nanocomposites incorporating semiconductor CdSe quantum dots
Xiangming Liu; Yasuo Tomita; Yusuke Adachi; Juro Oshima; Takuya Nakashima; Tsuyoshi Kawai
Oral presentation, English, 応用物理学会,第７２回応用物理学会学術講演会
Aug. 2011 - 光重合性半導体CdSe量子ドットーポリマーコンポジット中の非線形光波混合
安達佑亮; Xiangming Liu; 富田康生; 大島寿朗; 中嶋琢也; 河合壯
Oral presentation, Japanese, 応用物理学会,第７２回応用物理学会学術講演会
Aug. 2011 - 光重合性ナノコンポジットポリマー －その特性とホログラフィー、非線形光学、中性子光学への応用－
富田康生
Invited oral presentation, Japanese, 第72回応用物理学会学術講演会, 応用物理学会
Aug. 2011 - Holographic gratings for cold neutrons optics
M. Fally; J. Klepp; C. Pruner; Y. Tomita; H. Eckerlebe; J. Kohlbrecher; R.A. Rupp
Invited oral presentation, English, ICO international conference on Information Photonics 2011, International Commission for Optics (ICO), IEEE, Ottawa, Canada, International conference
May 2011 - 低重合収縮・高屈折率変調特性を有するナノ微粒子―ポリマーコンポジットIV
羽田英司; 富田康生
Oral presentation, Japanese, 応用物理学会,第58回応用物理学関係連合講演会
Mar. 2011 - ナノ微粒子―ポリマーコンポジットを用いたホログラフィックページデータ記録
百瀬啓祐; 高山新吾; 富田康生
Oral presentation, Japanese, 応用物理学会,第58回応用物理学関係連合講演会
Mar. 2011 - ホログラフィック応用、非線形光学、中性子光学のための光重合性ナノコンポジットポリマー
富田康生
Invited oral presentation, Japanese, 第58回応用物理学関係連合講演会, 応用物理学会
Mar. 2011 - 逐次重合型モノマーを用いたナノ微粒子-ポリマーコンポジットの光重合特性とそのホログラフィックデータ記録メディアへの応用
安井理; 羽田英司; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学合同シンポジウム「ナノ未来材料とコヒーレント光科学」, 東京農工大学・電気通信大学, 東京
Dec. 2010 - Nanoparticle-polymer composites for holographic applications, nonlinear optics and cold neutrons optics
Yasuo Tomita
Invited oral presentation, English, Invited lecture, Physics Department, Dublin Institute of Technology, Dublin, Ireland, International conference
Dec. 2010 - 高屈折率変調・低重合収縮・高熱的安定性を有する無機ナノ微粒子―ポリマーコンポジット
羽田英司; 富田康生
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2010
Nov. 2010 - ホログラフィック高分子分散液晶の温度制御による高回折効率と低光散乱特性を有する体積ホログラムの多重記録
大村隆一郎; 富田康生
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2010
Nov. 2010 - アゾベンゼン修飾有機ナノ微粒子―フォトポリマーコンポジット膜中に記録されたBraggグレーティングの光制御
山下恭平; 富田康生; 安井圭
Oral presentation, Japanese, 日本光学会,Optics&Photonics Japan 2010
Nov. 2010 - 高屈折率変調(M/#>3)と低光散乱特性を有するホログラフィック高分子分散液晶
大平隆一郎; 富田康生
Oral presentation, Japanese, 第７１回応用物理学会学術講演会講演予稿集,第７１回応用物理学会学術講演会
Sep. 2010 - 低重合収縮・高屈折率変調特性を有するナノ微粒子―ポリマーコンポジット III
羽田英司; 富田康生
Oral presentation, Japanese, 第７１回応用物理学会学術講演会講演予稿集,第７１回応用物理学会学術講演会
Sep. 2010 - 低重合収縮・高屈折率変調特性を有するナノ微粒子-ポリマーコンポジット II
羽田英司; 富田康生
Oral presentation, Japanese, 第5７回応用物理学関係連合講演会講演予稿集,第5７回応用物理学関係連合講演会
Mar. 2010 - チオール・エンモノマーを用いたナノ微粒子-ポリマ ーコンポジットの青紫色波長領域におけるホログラフィック記録特性
大村考志; 安井理; 富田康生
Oral presentation, Japanese, 第5７回応用物理学関係連合講演会講演予稿集,第5７回応用物理学関係連合講演会
Mar. 2010 - High contrast Bragg grating structures fabricated by holographic assembly of semiconductor CdSe quantum dots in polymer
X. Liu; Y. Tomita; J. Oshima; K. Chikama; T. Nakashima; T. Kawai
Oral presentation, English, 第5７回応用物理学関係連合講演会講演予稿集,第5７回応用物理学関係連合講演会
Mar. 2010 - ペリストロフィック/角度多重記録法を用いたナノ微粒子-ポリマーコンポジットのホログラフィック多重記録特性
香田祖光; 百瀬啓祐; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学合同シンポジウム「ナノ未来材料とコヒーレント光科学」第６回公開シンポジウム, 電気通信大学・東京農工大学, 東京
Dec. 2009 - Measurement of optical nonlinearities of hyperbranched polymer-gold or platiuman nonoparticle complex embedded in photopolymer films
Xiangming Liu; Yasuo Tomita; Kei Yasui; Keisuke Kojima
Public symposium, Japanese, 東京農工大学・電気通信大学合同シンポジウム「ナノ未来材料とコヒーレント光科学」第６回公開シンポジウム, 電気通信大学・東京農工大学, 東京
Dec. 2009 - 青紫波長領域におけるナノ微粒子―ポリマーコンポジットのホログラフィック記録特性
大村孝志; 富田康生
Oral presentation, Japanese, 第７０回応用物理学会学術講演会講演予稿集,第７０回応用物理学会学術講演会
Sep. 2009 - 低重合収縮・高屈折率変調特性を有するナノ微粒子―ポリマーコンポジット
羽田英司; 富田康生
Oral presentation, Japanese, 第７０回応用物理学会学術講演会講演予稿集,第７０回応用物理学会学術講演会
Sep. 2009 - Z-scan measurement of nonlinear absorption and refraction in nanocomposites doped with hyperbranched polymer-metallic nanoparticle complex
X. Liu; Y. Tomita; K. Yasui; K. Kojima
Oral presentation, English, 第７０回応用物理学会学術講演会講演予稿集,第７０回応用物理学会学術講演会
Sep. 2009 - ホログラフィック高分子液晶を用いた２次元ハニカムフォトニック結晶の波長分散特性
三木真優; 大平隆一郎; 富田康生
Oral presentation, Japanese, 第７０回応用物理学会学術講演会講演予稿集,第７０回応用物理学会学術講演会
Sep. 2009 - Holographic nanoparticle-polymer composites for photonics and neutron optics
Yasuo Tomita
Invited oral presentation, English, The eighth Japan-Finland Joint Symposium on Optics in Engineering (OIE'09), OSJ/JSAP, Tokyo, Japan, International conference
Sep. 2009 - Photonic nanocomposite materials for holographic data storage
Y. Tomita
Invited oral presentation, English, Optical Data Storage 2009, IEEE/LEOS, Orland, U.S.A., International conference
May 2009 - ナノ微粒子―ポリマーコンポジットの青紫波長域におけるホログラフィク記録特性
大村孝志; 富田康生; 大森健太郎; 日高基彦
Oral presentation, Japanese, 第5６回応用物理学関係連合講演会講演予稿集,第5６回応用物理学関係連合講演会講演
Apr. 2009 - ZrO2ナノ微粒子―ポリマーコンポジット中に記録された体積ホログラムの格子間隔依存性
中村俊博; 富田康生
Oral presentation, Japanese, 第5６回応用物理学関係連合講演会講演予稿集,第5６回応用物理学関係連合講演会講演
Apr. 2009 - ナノ微粒子―ポリマーコンポジット中に記録された体積ホログラムの重合収縮低減化
羽田英司; 中村俊博; 富田康生
Oral presentation, Japanese, 第5６回応用物理学関係連合講演会講演予稿集,第5６回応用物理学関係連合講演会
Apr. 2009 - Numerical analysis of Brillouin slow-light propagation of a subnanosecond pulse in an optical fiber
Liyong Ren; Yasuo Tomita
Oral presentation, English, 第5６回応用物理学関係連合講演会講演予稿集,第5６回応用物理学関係連合講演会
Apr. 2009 - SBS-based slow light in optical fibers: optimum design considerations for undistorted slow-light signal propagation in small and large signal regimes
L. Ren; Y. Tomita
Invited oral presentation, English, SPIE Photonics West 2009, SPIE, San Jose, U.S.A., International conference
Jan. 2009 - 逐次重合モノマーを用いたホログラフィック高分子分散液晶の回折特性
西村亮祐; 大村隆一郎; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学合同シンポジウム「ナノ未来材料とコヒーレント光科学」第５回公開シンポジウム, 電気通信大学・東京農工大学, 調布
Dec. 2008 - ナノ微粒子-ポリマーコンポジット材料の青紫色波長域におけるホログラフィック記録特性
大村孝志; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学合同シンポジウム「ナノ未来材料とコヒーレント光科学」第５回公開シンポジウム, 電気通信大学・東京農工大学, 調布
Dec. 2008 - ホログラフィック高分子分散液晶中に形成される体積ホログラムの光学的異方性の温度制御
西村亮祐; 大村隆一郎; 富田康生
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2008講演予稿集,日本光学会年次学術講演会Optics&Photonics Japan 2008
Nov. 2008 - Low pulse-broadning SBS slow light in optical fibers using two broadband beams
Liyong Ren; Yasuo Tomita
Oral presentation, English, 第６９回応用物理学会学術講演会講演予稿集,第６９回応用物理学会学術講演会
Sep. 2008 - 水素供与体/受容体添加によるZrO2ナノ 微粒子ーポリマーコンポジットのホログラフィック記録特性
中村俊博; 富田康生; 大森健太郎; 日高基彦
Oral presentation, Japanese, 第６９回応用物理学会学術講演会講演予稿集,第６９回応用物理学会学術講演会
Sep. 2008 - ナノ微粒子ーポリマーコンポジットフィルムを用いた体積ホログラム多重記録,
香田粗光; 富田康生
Oral presentation, Japanese, 第６９回応用物理学会学術講演会講演予稿集,第６９回応用物理学会学術講演会
Sep. 2008 - ホログラフィック高分子液晶を用いた２次元ハニカムフォトニック結晶における負の屈折率効果の観測とその電気的制御
三木真優; 富田康生
Oral presentation, Japanese, 第６９回応用物理学会学術講演会講演予稿集,第６９回応用物理学会学術講演会
Sep. 2008 - ホログラフィック高分子分散液晶中に形成された光学的異方性ホログラムの回折特性
飯岡秀俊; 富田康生
Oral presentation, Japanese, 第5５回応用物理学関係連合講演会講演予稿集,第5５回応用物理学関係連合講演会
Mar. 2008 - ナノ微粒子ーハイパーブランチポリマー分散 ナノコンポジットフィルムの線形・非線形光学特性
松村浩司; 富田康生; 安井圭; 近間克己
Oral presentation, Japanese, 第5５回応用物理学関係連合講演会講演予稿集,第5５回応用物理学関係連合講演会
Mar. 2008 - A new method of spectral SBS gain tailoring for slow light in a single-mode optical fiber
Liyong Ren; Yasuo Tomita
Oral presentation, English, 第5５回応用物理学関係連合講演会講演予稿集,第5５回応用物理学関係連合講演会
Mar. 2008 - ナノ微粒子ーポリマーコンポジットフィルム中に記録された体積ホログラムの熱的特性
中村俊博; 多胡厚津史; 富田康生
Oral presentation, Japanese, 第5５回応用物理学関係連合講演会講演予稿集,第5５回応用物理学関係連合講演会
Mar. 2008 - ホログラフィック高分子液晶を用いた２次元ハニカムフォトニック結晶の電気的制御
三木真優; 飯岡秀俊; 田村一; 黒住真一; 富田康生
Oral presentation, Japanese, 第5５回応用物理学関係連合講演会講演予稿集,第5５回応用物理学関係連合講演会
Mar. 2008 - ナノ微粒子分散フォトポリマーに記録された体積ホログラフィック格子の熱的安定性の評価
中村俊博; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第４回公開シンポジウム, 電気通信大学・東京農工大学
Dec. 2007 - ホログラフィック高分子分散液晶を用いた2次元ハニカムフォトニック結晶の特性
三木 真優; 黒住 真一; 飯岡 秀俊; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第４回公開シンポジウム, 電気通信大学・東京農工大学
Dec. 2007 - ホログラフィック高分子分散液晶における異方性ホログラム形成の温度依存性
飯岡 秀俊; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第４回公開シンポジウム, 電気通信大学・東京農工大学
Dec. 2007 - Characterization of volume gratings recorded in ZrO2 nanoparticle-dispersed photopolymers
Naoaki Suzuki; Yasuo Tomita
Public symposium, English, International Symposium on Coherent Optical Science, UEC, Tokyo
Dec. 2007 - Temperature-dependent anisotropic grating formation in a holographic polymer-dispersed liquid crystal
Hidetoshi Iioka; Yasuo Tomita
Public symposium, English, International Symposium on Coherent Optical Science, UEC, Tokyo
Dec. 2007 - Reducing GVD-dependent broadening of SBS slow light in an optical fiber by use of a single cw pump laser
Liyong Ren; Yasuo Tomita
Public symposium, English, International Symposium on Coherent Optical Science, UEC, Tokyo
Dec. 2007 - 水素受容体/供与体を用いたZrO2ナノ微粒子分散ホログラフィックフォトポリマーの高記録感度化
野崎純司; 中村俊博; 富田康生; 大森健太郎; 日高基彦
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2007講演予稿集,日本光学会年次学術講演会 Optics&Photonics Japan 2007
Nov. 2007 - ZrO2ナノ微粒子分散フォトポリマーの青紫波長域におけるホログラフィック記録特性
劉夢冬; 中村俊博; 富田康生
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2007講演予稿集,日本光学会年次学術講演会 Optics&Photonics Japan 2007
Nov. 2007 - Distortion management of wide bandwidth SBS slow light in a single mode optical fiber by using two broadband pump beams
L. Ren; Y. Tomita
Oral presentation, Japanese, 日本光学会年次学術講演会 Optics&Photonics Japan 2007講演予稿集,日本光学会年次学術講演会 Optics&Photonics Japan 2007
Nov. 2007 - 飯岡秀俊、富田康生
ホログラフィック高分子分散液晶における外部電場応答の記録温度依存性
Oral presentation, Japanese, 第６８回応用物理学会学術講演会講演予稿集,第６８回応用物理学会学術講演会
Sep. 2007 - 高分子中のホログラフィックナノ微粒子配列のための多次元光重合駆動拡散モデル
黒住真一; 三木真優; 富田康生
Oral presentation, Japanese, 第６８回応用物理学会学術講演会講演予稿集,第６８回応用物理学会学術講演会
Sep. 2007 - ホログラフィック高分子分散液晶を用いた２次元ハニカムフォトニック結晶の特性評価
三木真優; 黒住真一; 飯岡秀俊; 富田康生
Oral presentation, Japanese, 第６８回応用物理学会学術講演会講演予稿集,第６８回応用物理学会学術講演会
Sep. 2007 - Holographic assembly of nanoparticles in polymers for 3D recording and patterning
Y. Tomita; N. Suzuki; Y. Endoh; S. Kurozumi; M. Miki; K. Chikama
Invited oral presentation, English, SPIE Optics & Photonics 2007 Symposium, SPIE, San Diego, U.S.A., International conference
Aug. 2007 - Nanoparticle-photopolymer composites for holographic applications
Y. Tomita
Invited oral presentation, English, Conference on lasers and electro-optics (CLEO)-Europe 2007, IEEE, OSA, APS, Munich, Germany, International conference
Jun. 2007 - ホログラフィックデータ記録応用のためのナノ微粒子-フォトポリマー複合材料
富田康生
Invited oral presentation, Japanese, 第４回ニューガラスセミナー, ニューガラスフォーラム
Mar. 2007 - 高分子分散液晶中の異方性透過型体積ホログラムによる回折効率偏光特性の制御
山畑篤; 富田康生
Oral presentation, Japanese, 日本応用物理学会,第5４回応用物理学関係連合講演会
Mar. 2007 - ZrO2ナノ微粒子分散フォトポリマーのホログラム形成メカニズム
鈴木直昭; 富田康生; 大森健太郎; 日高基彦; 近間克己
Oral presentation, Japanese, 日本応用物理学会,第5４回応用物理学関係連合講演会
Mar. 2007 - ホログラフィック応用のためのナノ微粒子フォトポリマー
富田康生
Invited oral presentation, Japanese, 第１６回光反応・電子用材料研究会, 高分子学会
Jan. 2007 - 高透明性ZrO2ナノ微粒子分散フォトポリマーを用いた高効率ホログラフィック記録
鈴木直昭; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第３回公開シンポジウム, 電気通信大学・東京農工大学
Dec. 2006 - 高屈折率低分子モノマー分散二成分フォトポリマーのホログラム記録特性
高橋啓司; 松村浩司; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第３回公開シンポジウム, 電気通信大学・東京農工大学
Dec. 2006 - ホログラフィック高分子分散液晶における異方性透過型格子形成への界面活性剤の影響
翁武; 飯岡秀俊; 劉夢冬; 富田康生
Oral presentation, Japanese, 日本光学会,Optics Japan 2006
Nov. 2006 - Mg、Fe添加LiNbO3結晶におけるUV光誘起吸収特性
坂本あすか; Haijun Qiao; 富田康生; Guoquan Zhang; Yongfa Kong
Oral presentation, Japanese, 日本光学会,Optics Japan 2006
Nov. 2006 - ZrO2ナノ微粒子分散フォトポリマーのホログラム記録特性
鈴木直昭; 富田康生; 大森健太郎; 日高基彦; 近間克己
Oral presentation, Japanese, 日本応用物理学会,第６７回応用物理学会学術講演会
Aug. 2006 - 高屈折率低分子モノマー分散二成分系フォトポリマーのホログラム記録特性
松村浩司; 内藤貴博; 高橋啓司; 富田康生
Oral presentation, Japanese, 日本応用物理学会,第６７回応用物理学会学術講演会
Aug. 2006 - ホログラフィック高分子分散液晶における異方性ホログラム形成の温度依存性
飯岡秀俊; 富田康生
Oral presentation, Japanese, 日本応用物理学会,第６７回応用物理学会学術講演会
Aug. 2006 - Mg, Fe添加LiNbO3結晶におけるUV光誘起吸収変化暗減衰のプローブ光波長依存性
坂本あすか; 富田康生
Oral presentation, Japanese, 日本応用物理学会,第６７回応用物理学会学術講演会
Aug. 2006 - 統計熱力学的手法による多成分系フォトポリマーのホログラム形成過程の解析
遠藤豊; 富田康生
Oral presentation, Japanese, 日本応用物理学会,第６７回応用物理学会学術講演会
Aug. 2006 - Nanocomposite photopolymers doped with nanoparticles for volume holographic recording
Y. Tomita; Y. Endoh; K. Furushima; J. Nozaki
Invited oral presentation, English, SPIE International Conference on Application of Photonic Technology (Photonics North 2006), SPIE, International conference
Jun. 2006 - Volume holographic recording in multi-component photopolymers with hyperbranched polymers as organic nanoparticles
Y. Tomita; K. Furushima; Y. Endoh; M. Hidaka; K; Ohmori; K. Chikama
Invited oral presentation, English, International Symposium on Photonics Europe, SPIE, Strasbourg, France, International conference
Apr. 2006 - ナノ微粒子分布のホログラフィック操作による体積ホログラフィック記録
富田康生
Invited oral presentation, Japanese, 平成１７年度第３回研究会、「実用化間近のホログラム記録 － 次世代光記録の本物“ホログラム”はBlu-rayを超えられるか-」, 近畿化学協会エレクトロニクス部会
Mar. 2006 - 電子プローブマイクロアナライザーによるナノ微粒子分散フォトポリマー中に形成されたホログラムの組成解析
富田康生; 近間克己; 遠藤豊; 鈴木直昭; 古嶋康志
Oral presentation, Japanese, 日本応用物理学会,第５３回応用物理学関係連合講演会講演
Mar. 2006 - フォトポリマーの非局所的光学応答と重合収縮を考慮したホログラフィック格子形成モデル
遠藤豊; 古嶋康志; 富田康生
Oral presentation, Japanese, 日本応用物理学会,第５３回応用物理学関係連合講演会講演
Mar. 2006 - シリカ微粒子分散3成分系フォトポリマーのホログラム記録特性
高橋 啓司; 内藤 貴博; 富田康生
Oral presentation, Japanese, 日本応用物理学会,第５３回応用物理学関係連合講演会
Mar. 2006 - Ultraviolet-light-induced absorption changes in highly zinc-doped LiNbO3,
Haijun Qiao; Yasuo Tomita
Oral presentation, English, 日本応用物理学会,第５３回応用物理学関係連合講演会
Mar. 2006 - Ultraviet-light-gating two-color photorefractive effect in Zn-doped lithium niobate crystals
Haijun Qiao; Yasuo Tomita
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第２回公開シンポジウム講演資料, 電気通信大学・東京農工大学, 東京
Dec. 2005 - 無機・有機ハイブリッド型フォトポリマー膜のホログラフィック記録特性
高橋啓司; 内藤貴博; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第２回公開シンポジウム講演資料, 電気通信大学・東京農工大学, 東京
Dec. 2005 - フォトポリマー中のナノ微粒子分布のホログラフィック制御による光記録
富田康生
Invited oral presentation, Japanese, 液晶フォトニクス・光デバイス研究フォーラム、「光メモリーの新展開(2)～新材料とホログラム技術への期待～」, 日本液晶学会
Dec. 2005 - ナノ微粒子分散フォトポリマーのホログラム形成過程におけるモノマーの粘度の影響
鈴木直昭; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第２回公開シンポジウム講演資料, 電気通信大学・東京農工大学, 東京
Dec. 2005 - 有機ナノ微粒子分散カチオン重合系フォトポリマーのホログラフィック記録特性
古嶋康志; 富田康生; 日高基彦; 大森健太郎; 小澤雅昭; 田中章博; 近間克己
Oral presentation, Japanese, 日本光学会
Nov. 2005 - Mg添加LiNbO3結晶を用いた２色ホログラフィック記録における屈折率格子の振幅/位相の同時測定
松島亮; Haijun Qiao; 富田康生
Oral presentation, Japanese, 日本光学会,日本光学会年次学術講演会 Optics Japan 2005講演予稿集
Nov. 2005 - ハイパーブランチナノ微粒子分散フォトポリマーのホログラム記録特性
越智紅一郎; 石津浩二; 古嶋康志; 富田康生; 小澤雅昭
Oral presentation, Japanese, 高分子学会,第１４回ポリマー材料フォーラム
Nov. 2005 - Holographic control of nanoparticle-distribution morphology in photopolymers for volume holographic recording and nonlinear optics
Yasuo Tomita; Naoaki Suzuki; Yutaka Endoh
Invited oral presentation, English, The sixth Japan-Finland Joint Symposium on Optics in Engineering (OIE'05), Technical Digest of the sixth Japan-Finland Joint Symposium on Optics in Engineering (OIE'05)/OSJ/JSAP, Sapporo, International conference
Sep. 2005 - Ultraviolet self-pumped phase conjugation by photorefractive backscattering in LiNbO3:Mg
Haijun Qiao; Yasuo Tomita
Oral presentation, English, 第６６回応用物理学会学術講演会講演予稿集,第６６回応用物理学会学術講演会講演予稿集
Sep. 2005 - 有機ナノ微粒子分散フォトポリマーのホログラフィック記録特性評価
古嶋康志; 富田康生; 越智紅一郎; 石津浩二
Oral presentation, Japanese, 第６６回応用物理学会学術講演会講演予稿集,第６６回応用物理学会学術講演会講演予稿集
Sep. 2005 - ホログラフィック高分子液晶における異方性ホログラフィック格子形成の観測
平洋一; 富田康生
Oral presentation, Japanese, 第６６回応用物理学会学術講演会講演予稿集,第６６回応用物理学会学術講演会講演予稿集
Sep. 2005 - ホログラフィックフォトポリマーにおけるconical diffractionの観測
鈴木直昭; 富田康生
Oral presentation, Japanese, 第６６回応用物理学会学術講演会講演予稿集,第６６回応用物理学会学術講演会講演予稿集
Sep. 2005 - ハイパーブランチナノ微粒子分散フォトポリマーのホログラム記録特性
越智紅一郎; 石津浩二; 古嶋康志; 富田康生
Oral presentation, Japanese, 第５４回高分子討論会予稿集,第５４回高分子討論会予稿集
Sep. 2005 - Holographic manipulation of nanoparticle-distribution morphology in photopolymers and its applications to volume holographic recording and nonlinear photonic crystals
Y. Tomita
Invited oral presentation, English, Photorefractive materials, effects and devices 2005 (PR05), OSA, Sanya, Hainan, China, International conference
Jul. 2005 - Observation of the isotropic conical diffraction in holographic photopolymers
Naoaki Suzuki; Yasuo Tomita
Public symposium, English, International Symposium on Coherent Optical Science, UEC, Tokyo
Jul. 2005 - Observation of the isotropic conical diffraction in holographic photopolymers
Naoaki Suzuki; Yasuo Tomita
Public symposium, English, International Symposium on Coherent Optical Science, UEC, Tokyo
Jul. 2005 - Characterization of methacrylate photopolymer films doped with silica nanoparticles and transparent plastics
Hiroshi Takahashi; Junya Yamauchi; Yasuo Tomita
Public symposium, English, International Symposium on Coherent Optical Science, UEC, Tokyo
Jul. 2005 - ホログラフィック高分子分散液晶におけるホログラフィック記録過程の解析
平洋一; 古嶋康志; 山畑篤; 富田康生
Oral presentation, Japanese, 日本応用物理学会,第５２回応用物理学関係連合講演会講演予稿集
Mar. 2005 - ホログラフィック高分子分散液晶におけるホログラフィック記録過程の解析
平洋一; 古嶋康志; 山畑篤; 富田康生
Oral presentation, Japanese, 第５２回応用物理学関係連合講演会講演予稿集
Mar. 2005 - ナノ微粒子分散フォトポリマーのホログラム形成におけ る非局所的光学応答の影響
遠藤豊; 古嶋康志; 富田康生
Oral presentation, Japanese, 第５２回応用物理学関係連合講演会講演予稿集
Mar. 2005 - 透明プラステック材料を用いたバインダーフォトポリマーのホログラム記録特性
高橋啓司; 山内淳也; 富田康生
Oral presentation, Japanese, 第５２回応用物理学関係連合講演会講演予稿集
Mar. 2005 - 有機ナノ微粒子分散フォトポリマーのホログラフィック記録特性
古嶋康志; 富田康生; 石津浩二
Oral presentation, Japanese, 第５２回応用物理学関係連合講演会講演予稿集,第５２回応用物理学関係連合講演会講演予稿集
Mar. 2005 - ナノ微粒子分散有機・無機複合フォトポリマーに関する研究
富田康生
Others, Japanese, 平成１５年度岩谷直治記念財団年報
Dec. 2004 - "ナノ微粒子分散フォトポリマー膜の多層化によるフォトニックデバイスの創製
高橋啓司; 山内淳也; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第１回公開シンポジウム, 電気通信大学・東京農工大学
Dec. 2004 - ナノ微粒子分散フォトポリマーに記録された体積ホログラムの回折特性
鈴木直昭; 富田康生
Public symposium, Japanese, 東京農工大学・電気通信大学２１世紀COEプログラム合同シンポジウム「ナノ未来材料とコヒーレント光科学」第１回公開シンポジウム, 電気通信大学・東京農工大学
Dec. 2004 - ナノ微粒子分散フォトポリマー中のホログラフィック格子形成に おけるTromsdorff効果の影響
古嶋康志; 富田康生
Oral presentation, 日本光学会年次学術講演会 Optics Japan 2004講演予稿集
Nov. 2004 - Mg添加LiNbO3結晶中のUV光ゲーティング２色ホログラフィック格子の増強
松島亮; 富田康生
Oral presentation, 第６５回応用物理学会学術講演会講演予稿集
Sep. 2004 - Organic-inorganic nanocomposite for holographic recording with net diffraction efficiency near 100%
Yasuo Tomita
Invited oral presentation, English, Technical Digest of the 2004 International Commission for Optics (ICO'04), Chiba, International conference
Jul. 2004 - ホログラフィックな手法によるフォトポリマーの光重合パラメーターの評価
長谷部浩一; 古嶋康志; 富田康生
Oral presentation, Japanese, 第５１回応用物理学関係連合講演会講演予稿集
Mar. 2004 - 無機ナノ微粒子分散フォトポリマーのホログラフィック格子形成について
富田康生; 鈴木直昭
Oral presentation, Japanese, 第５１回応用物理学関係連合講演会講演予稿集
Mar. 2004 - 無機ナノ微粒子フォトポリマーにおけるホログラム形成モデル
古嶋康志; 富田康生
Oral presentation, Japanese, 第５１回応用物理学関係連合講演会講演予稿集
Mar. 2004 - Mg添加LiNbO3結晶中の２色ホログラフィック記録過程における２光波結合現象
松島亮; Weiwen Zou; 富田康生
Oral presentation, Japanese, 第５１回応用物理学関係連合講演会講演予稿集
Mar. 2004 - ナノ微粒子分散フォトポリマーに形成される体積ホログラムの回折特性
鈴木直昭; 富田康生
Oral presentation, 日本光学会年次学術講演会 Optics Japan 2003講演予稿集
Dec. 2003 - Photonic recording materials
Yasuo Tomita
Invited oral presentation, English, 電気通信大学２１世紀COEプログラム「コヒーレント光科学の展開」第１回公開シンポジウム講演予稿集
Dec. 2003 - Two-color photorefractive effect in near-stoichiometric LiNbO3 doped with magnesium
Yasuo Tomita; Weiwen Zou
Public symposium, Japanese, 電気通信大学２１世紀COEプログラム「コヒーレント光科学の展開」第１回公開シンポジウム講演予稿集, 電気通信大学２１世紀COEプログラム「コヒーレント光科学の展開」第１回公開シンポジウム講演予稿集
Dec. 2003 - Photonic recording materials
Yasuo Tomita
Invited oral presentation, English, 電気通信大学２１世紀COEプログラム「コヒーレント光科学の展開」第１回公開シンポジウム講演予稿集, 電気通信大学２１世紀COEプログラム「コヒーレント光科学の展開」第１回公開シンポジウム講演予稿集
Dec. 2003 - ナノ微粒子分散フォトポリマーにおけるホログラフィック格子の位相シフトの測定
鈴木直昭; 富田康生
Oral presentation, Japanese, 第６４回応用物理学会学術講演会講演予稿集
Aug. 2003 - UV光を用いたMgドープLiNbO3結晶の２色ホログラフィック記録特性
富田康生; Steven Sunarno
Oral presentation, Japanese, 第５０回応用物理学関係連合講演会講演予稿集
Mar. 2003 - 色素添加によるSiO2ナノ微粒子分散フォトポリマー の高記録感度化
西開宏史; 富田康生; 鈴木直昭
Oral presentation, Japanese, 第５０回応用物理学関係連合講演会講演予稿集
Mar. 2003 - SiO2ナノ微粒子分散フォトポリマーにおける微粒子径の回折効率への影響
鈴木直昭; 富田康生
Oral presentation, Japanese, 第５０回応用物理学関係連合講演会講演予稿集
Mar. 2003 - In-concentration dependence of light-induced absorption changes in LiNbO3
S.Sunarno; Y.Tomita
Oral presentation, English, 第６３回応用物理学会学術講演会講演予稿集
Sep. 2002 - UV-induced absorption and its application to two-color holography in LiNbO3:Mg
G.Zhang; Y.Tomita
Oral presentation, English, 第４９回応用物理学関係連合講演会講演予稿集
Mar. 2002 - 無機微粒子分散フォトポリマー中における体積ホログラムの高感度化
小嶋隆; 富田康生
Oral presentation, Japanese, 第４９回応用物理学関係連合講演会講演予稿集
Mar. 2002 - TiO2微粒子分散フォトポリマーの回折光特性
鈴木直昭; 小嶋隆; 富田康生
Oral presentation, Japanese, 第４９回応用物理学関係連合講演会講演予稿集
Mar. 2002 - フォトリフラクティブ結晶の連続光２光子遷移に関する研究
富田康生
Others, Japanese, 平成１１～１３年度科学研究費補助金[基盤研究(B)(2)]研究成果報告書
Mar. 2002 - 無機微粒子分散フォトポリマー中における体積ホログラムの形成
小嶋隆; 富田康生
Oral presentation, Japanese, 第６２回応用物理学会学術講演会講演予稿集,第６２回応用物理学会学術講演会講演予稿集
Sep. 2001 - Near-infrared holographic recording with quasi-nondestructive readout in LiNbO3:In,Fe
G.Zhang; Y.Tomita
Oral presentation, English, 第６２回応用物理学会学術講演会講演予稿集,第６２回応用物理学会学術講演会講演予稿集
Sep. 2001 - Light-induced absorption changes in Indium doped LiNbO3
S.Sunarno; G.Zhang; Y.Tomita
Oral presentation, English, 第６２回応用物理学会学術講演会講演予稿集,第６２回応用物理学会学術講演会講演予稿集
Sep. 2001 - LiNbO3結晶における光誘起吸収緩和過程
星光成; S.Sunarno; 富田康生
Oral presentation, Japanese, 第４８回 応用物理学関係連合講演会講演予稿集,第４８回 応用物理学関係連合講演会講演予稿集
Mar. 2001 - Slow dark decay of light-induced charges on shallow levels in LiNbO3:Mg and its influences on two-color holographic recording
G.Zhang; Y.Tomita
Oral presentation, English, 第４８回応用物理学関係連合講演会講演予稿集,第４８回応用物理学関係連合講演会講演予稿集
Mar. 2001 - メタクリレートフォトポリマーフィルム中における多重格子の形成
小嶋隆; 富田康生
Oral presentation, Japanese, 第６１回応用物理学会学術講演会講演予稿集,第６１回応用物理学会学術講演会講演予稿集
Sep. 2000 - ErドープLiNbO3結晶における二色ホログラフィック記録
星光成; 富田康生
Oral presentation, Japanese, 第６１回応用物理学会学術講演会講演予稿集,第６１回応用物理学会学術講演会講演予稿集
Sep. 2000 - Nonvolatile two-color holography in indium-doped lithium niobate
G.Zhang; Y.Tomita
Oral presentation, English, 第６１回応用物理学会学術講演会講演予稿集,第６１回応用物理学会学術講演会講演予稿集
Sep. 2000 - 反射型フォトリフラクティブホログラムにおけるアポダイゼーション現象
富田康生; 久世良太
Oral presentation, Japanese, 第４７回応用物理学関係連合講演会講演予稿集,第４７回応用物理学関係連合講演会講演予稿集
Mar. 2000 - 直交偏光ピコ秒２光波混合法を用いたチタン酸バリウムの２光子吸収係数の測定
富田康生; 飯銅 剛
Oral presentation, Japanese, 第60回応用物理学会学術講演会講演予稿集
Sep. 1999 - The effect of matrix on diffraction grating formationin liquid crystal doped photorefractive polymer
F. Nishida; N. Kushibiki; Y. Tomita
Oral presentation, English, 第46回応用物理学関係連合講演会講演予稿集
Mar. 1999 - フォトリフラクティブ超短光パルス応答におけるホットエレクトロン非線形輸送の影響
富田康生
Others, Japanese, 平成９～１０年度科学研究費補助金[基盤研究(C)(2)]研究成果報告書,平成９～１０年度科学研究費補助金[基盤研究(C)(2)]研究成果報告書
Mar. 1999 - タングステン・ブロンズ系強誘電体フォトリフラクティブ材料の研究
富田康生
Others, Japanese, 光産業技術振興協会 光材料研究者データベース,光産業技術振興協会 光材料研究者データベース
Mar. 1999 - Self-enhanced diffraction properties of barium titanate with a thermally fixed grating
Yasuo Tomita
Invited oral presentation, English, Proceedings of the 1998 International Photonic Conference, Proceedings of the 1998 International Photonic Conference, Taipei, Taiwan, International conference
Dec. 1998 - チタン酸バリウム中の熱的定着ホログラムへのプロトン伝導の寄与
富田康生
Oral presentation, Japanese, 第59回応用物理学会学術講演会講演予稿集
Sep. 1998 - 強誘電体フォトリフラクティブ結晶の近赤外波長における非線形光学応答とそのホログラフィック光メモリーへの応用に関する研究（最終報告）」
富田康生
Others, Japanese, 平成１０年度岩谷直治記念財団研究報告書,平成１０年度岩谷直治記念財団研究報告書
Aug. 1998 - 強誘電体フォトリフラクティブ結晶の近赤外波長における非線形光学応答とそのホログラフィック光メモリーへの応用に関する研究（中間報告）」、
富田康生
Others, Japanese, 平成９年度岩谷直治記念財団研究報告書,平成９年度岩谷直治記念財団研究報告書
Aug. 1997 - 超短光パルスによる強誘電体フォトリフラクティブ結晶への屈折率格子形成とその固定化
富田康生
Others, Japanese, 平成７～８年度科学研究費[基盤研究(C)(2)]補助金研究成果報告書,平成７～８年度科学研究費[基盤研究(C)(2)]補助金研究成果報告書
Apr. 1997 - 半磁性半導体のフォトリフラクティブ非線形光学効果
富田康生
Others, Japanese, 平成７年度矢崎科学技術振興記念財団研究成果報告書,平成７年度矢崎科学技術振興記念財団研究成果報告書
Feb. 1996 - Photorefractive properties of doped KNSBN crystals
Y.Tomita; S.Matsushima
Invited oral presentation, English, Proceedings of Japan-U.S. Workshop on Functional Fronts in Advanced Ceramics (boundaries and defects), Proceedings of Japan-U.S. Workshop on Functional Fronts in Advanced Ceramics (boundaries and defects), Tsukuba, Japan, International conference
Dec. 1994 - タングステン・ブロンズ系強誘電体のフォトリフラクティブ非線形光学効果の研究
富田康生
Others, Japanese, 平成５年度池谷科学技術振興財団年報,平成５年度池谷科学技術振興財団年報
Dec. 1994 - 「フォトリフラクティブ材料」、 光技術応用システムのフィージビリティ調査報告書 －立体画像・レーザディスプレイ技術－
富田康生
Others, Japanese, 財団法人 光産業技術振興協会 立体画像・レーザディスプレイ技術調査委員会
Mar. 1993
Courses
- 固体ソフトマターファトニクス
The University of Electro-Communications - 固体ソフトマターファトニクス
電気通信大学 - Modern Optics and Photonics
The University of Electro-Communications - 固体・ソフトマターフォトニクス
The University of Electro-Communications - 固体・ソフトマターフォトニクス
The University of Electro-Communications - 固体・ソフトマターフォトニクス
電気通信大学 - 電磁気学および演習
The University of Electro-Communications - 光波工学
The University of Electro-Communications - 電磁気学および演習
The University of Electro-Communications - 電磁気学および演習
電気通信大学 - 固体・ソフトマターフォトニクス特論
The University of Electro-Communications - 固体・ソフトマターフォトニクス特論
電気通信大学 - 電磁気学第二
The University of Electro-Communications - 電磁気学第二
電気通信大学 - 光波工学
The University of Electro-Communications - 光波工学
電気通信大学 - Modern Optics and Photonics
The University of Electro-Communications - Modern Optics and Photonics
電気通信大学 - 電磁気学
The University of Electro-Communications - 電磁気学
The University of Electro-Communications - 電磁気学
電気通信大学
Affiliated academic society
Industrial Property Rights
- トリアジン環含有ハイパーブランチポリマーを含む体積ホログラム記録材料用組成物
Patent right, 富田康生, 亀谷康宏, 西村裕樹, 深水崇明, 西村直也, 大土井啓祐, 特願2014-045099, Date applied: 07 Mar. 2014, The University of Electro-Communications, 特許第6471390号, Date issued: 01 Feb. 2019 - 半導体微粒子を含む体積ホログラム記録材料用組成物
Patent right, 富田康生, 大島寿郎, 特願2009-295777, Date applied: 25 Dec. 2009, 国立大学法人 電気通信大学、日産化学工業株式会社, 特開2011-137854, Date announced: 14 Jul. 2011, 特許第5826455, Date issued: 23 Oct. 2015 - 金属ナノ粒子ーアンモニウム基含有分岐高分子化合物複合体を含有する感光性組成物
Patent right, 富田康生, 小島圭介, 大土井啓祐, 特願2009-201642, Date applied: 01 Sep. 2009, 国立大学法人 電気通信大学、日産化学工業株式会社, 特開2011-053416, Date announced: 17 Mar. 2011, 特許第5729800号, Date issued: 17 Apr. 2015 - 体積ホログラム記録材料用組成物及び体積ホログラム記録媒体
Patent right, 富田康生, 羽田英司, 大森健太郎, 小島圭介, 西村直也, 特願2009-115887, Date applied: 12 May 2009, The University of Electro-Communications, 特許第5665165号, Date issued: 19 Dec. 2014 - 有機ージルコニア複合微粒子を含む感光性組成物
Patent right, 富田康生, 鈴木直昭, 日高基彦, 大森健太郎, 大土井啓祐, 特願2008-530871, Date applied: 14 Aug. 2007, 国立大学法人 電気通信大学、日産化学工業株式会社, Date announced: 01 Oct. 2009, 特許第5485548号, Date issued: 28 Feb. 2014 - 金属ナノ微粒子ージチオカルバメート基含有高分子複合体を含有する感光性組成物
Patent right, 富田康生, 松村浩司, 安井圭, 近間克己, 大土井啓祐, 特願2008-082167, Date applied: 25 Mar. 2009, 国立大学法人 電気通信大学、日産化学工業株式会社, 特願2009-256657, Date announced: 05 Nov. 2009, 特許第5408704号, Date issued: 15 Nov. 2013 - ビニルシクロプロパン化合物を含む感光性組成物
Patent right, 富田康生, 中村俊博, 広岡明, 大島寿朗, 大森健太郎, 特願2009-112333, Date applied: 01 May 2009, 国立大学法人 電気通信大学、日産化学工業株式会社, 特開2010-260946, Date announced: 18 Nov. 2010, 特許5284866号, Date issued: 07 Jun. 2013 - 有機微粒子を含む感光性組成物
Patent right, 富田康生, 古嶋康志, 穐本和彦, 近間克己, 日高基彦, 大土井啓祐, 特願2005-337416, Date applied: 16 Mar. 2006, The University of Electro-Communications, 特許5008080号, Date issued: 08 Jun. 2012 - 応答性の改善されたポリシランフォトリフラクティブ素子
Patent right, 西田文人, 櫛引信男, 富田康生, -, 特開平11-271822, Date announced: 08 Oct. 1999, 4097314, Date issued: 21 Mar. 2008 - 微小機械の駆動装置
Patent right, 富田康生, -, 3413495, Date issued: 04 Apr. 2003 - 光パルス信号再生装置及び方法
Patent right, 富田康生, 柴田雅昭, -, 3311031, Date issued: 24 May 2002 - 光エコーメモリ記録再生装置及び方法
Patent right, 柴田雅昭, 富田康生, -, 3246677, Date issued: 02 Nov. 2001 - 光パルス幅測定装置
Patent right, 柴田雅章, 富田康生, -, 3151881, Date issued: 26 Jan. 2001 - 光データパルス列検出法
Patent right, 柴田雅章, 富田康生, -, Canon Inc., 3083111, Date issued: 30 Jun. 2000 - 光データパルス列発生法
Patent right, 柴田雅章, 富田康生, -, Canon Inc., 3020687, Date issued: 04 Jan. 2000 - 光クロスバースイッチ
Patent right, 富田康生, -, Canon Inc., 2980708, Date issued: 17 Sep. 1999 - 純光学的光変調器
Patent right, ヨハン ベリクイスト, 富田康生, -, Canon Inc., 2935478, Date issued: 04 Jun. 1999 - Optical polarization-state converting apparatus for use as isolator, modulator and the like
Patent right, Y. Tomita, H. Oda, M. Okuda, -, Canon Inc., 0470523B1, Date issued: 27 Jan. 1999 - Optical communication means
Patent right, Y. Tomita, -, Canon Inc., 0498422B1, Date issued: 29 Apr. 1998 - Optical interconnection networks and processes
Patent right, -, Canon Inc., 5339371, Date issued: 16 Aug. 1994 - Apparatus for measuring pulse width using two-photon medium
Patent right, M. Shibata, Y.Tomita, -, Canon Inc., 5299170, Date issued: 29 Mar. 1994 - All-optical light modulating apparatus and all-optical process for modulating light
Patent right, J. Bergquist, Y.Tomita, -, Canon Inc., 5289489, Date issued: 22 Feb. 1994 - Optical polarization-state converting apparatus for use as isolator, modulator and the like
Patent right, Y.Tomita, H. Oda, M. Okuda, -, Canon Inc., 5245465, Date issued: 14 Sep. 1993 - Method and apparatus for modulating light using semiconductor element having quantum well structure
Patent right, Y.Tomita, H. Oda, -, Canon Inc., 5229878, Date issued: 20 Jul. 1993 - Method and apparatus for obtaining modulated light indicative of an image operationally formed by projecting an inputted image on the flat plate of an optical induction reflective index crystal
Patent right, Y.Tomita, N. Taniguchi, -, Canon Inc., 5223966, Date issued: 23 Jun. 1993 - 光磁気記録媒体
Patent right, 富田康生, -, Canon Inc., 1749102, Date issued: 08 Apr. 1993 - 磁気光学的情報再生方式
Patent right, 富田康生, -, Canon Inc., 1715687, Date issued: 27 Nov. 1992 - 記録パターン読取系
Patent right, 富田康生, -, Canon Inc., 1714875, Date issued: 27 Nov. 1992 - 記録パターン読取系
Patent right, 富田康生, -, Canon Inc., 1696918, Date issued: 28 Sep. 1992 - 光結合器
Patent right, 富田康生, 松本和也, -, Canon Inc., 1634372, Date issued: 20 Jan. 1992 - 光結合装置
Patent right, 富田康生, 小倉繁太郎, 松本和也, -, Canon Inc., 1632326, Date issued: 26 Dec. 1991 - 光磁気記録読取系
Patent right, 富田康生, -, キャノン株式会社, 特公平02-037614, Date issued: 27 Aug. 1990 - Magneto-optical information reading apparatus
Patent right, Yasuo Tomita, -, Canon Inc., 3333194, Date issued: 19 May 1988 - Light signal method and apparatus using interference between two light beams of different frequency and polarization
Patent right, T. Yoshino, Y.Tomita, -, Canon Inc., 4660187, Date issued: 21 Apr. 1987 - Magneto-optical recording medium having alternately-layered high and low refractive index layers
Patent right, Yasuo Tomita, -, Canon Inc., 4649451, Date issued: 10 Mar. 1987 - Magneto-optical recording medium
Patent right, Yasuo Tomita, -, Canon Inc., 4639816, Date issued: 27 Jan. 1987 - Method of making an optical coupler device utilizing volatile liquid to achieve optical contact
Patent right, Y.Tomita, S. Ogura, K. Matsumoto, -, Canon Inc., 4637684, Date issued: 20 Jan. 1987 - Magneto-optical information reading apparatus
Patent right, Yasuo Tomita, -, Canon Inc., 4569035, Date issued: 04 Feb. 1986 - System for recording patterns of magnetically recorded information by utilizing the magneto-optic effect
Patent right, Yasuo Tomita, -, 4558440, Date issued: 10 Dec. 1985